[Biologic aspects of artificial insemination of domestic animals].
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Animals↗
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Real time pelvic ultrasonography during the periovulatory period of patients attending an artificial insemination clinic.
Real time ultrasonography was used to examine the ovaries of 50 patients at the calculated time for artificial insemination with donor semen (AID). Forty-two (84%) had one or more follicles greater than 13 mm in diameter. Both ovaries were monitored daily until the main follicle had ruptured (mean number of examinations, 2.4 per patient; range, 1 to 5). Seven women became pregnant (mean follicular diameter, 21.6 mm; range, 18 to 25 mm). The fecundability rate was 12%, compared with 6% for a corresponding group of 50 patients who were not examined with ultrasound. Seven patients experienced mittelschmerz, and in 39 the leading follicle had ruptured before the rise in basal body temperature (BBT). Ultrasonography may be used to confirm the presence or absence of preovulatory follicle prior to treatment.
Body Temperature↗
The establishment of a programme of artificial insemination by donor semen within the National Health Service.
A human semen bank has been established in Nottingham for artificial insemination using donor semen (AID). Frozen semen has been used for all inseminations. The introduction and organization of such a programme within the National Health Service is described. Six pregnancies have so far been confirmed and two normal infants have been delivered.
Female↗
Retrograde ejaculation: a more convenient method for artificial insemination.
A case of retrograde ejaculation not responding to medical treatment is described in which the problem of sterility was overcome by artificial insemination. The semen was collected from urine after coitus by previous alkalinization with 1.63 g NaHCO3 once daily. Pregnancy occurred at the 4th insemination during the 1st treatment cycle. This technique seems to be the most suitable for artificial insemination in cases of retrograde ejaculation.
Adult↗
Distribution and number of spermatozoa in the oviduct of the golden hamster after natural mating and artificial insemination.
A group of female hamsters was mated with males of proven fertility either several hours before or during ovulation. Another group of females was artificially inseminated several hours before ovulation. Females were killed at various times after the onset of mating or artificial insemination, oviducts were fixed and sectioned serially, and spermatozoa were counted individually as to their location in the oviduct. Regardless of the type or time of insemination, the vast majority of spermatozoa that entered the oviduct remained in the lower segments of the isthmus (the intramural and caudal isthmus) without ascending to the ampulla. The lower segments of the oviduct, particularly the caudal isthmus, appeared to be acting as a "sieve" and/or "sperm reservoir." In females mated or artificially inseminated prior to ovulation, virtually no spermatozoa reached the cephalic isthmus or ampulla until the commencement of ovulation. Although a few spermatozoa reached the ampulla by 1 h after the onset of mating, they were the exception rather than the rule. When females were mated during ovulation, spermatozoa spent a minimum of about 3 h in the caudal isthmus before ascending to the ampulla. The number of spermatozoa that entered the oviduct after artificial insemination was considerably lower than in naturally mated animals, but this low number was apparently large enough to ensure complete fertilization.
Animals↗
Influence of summer heat stress on pregnancy rates of lactating dairy cattle following embryo transfer or artificial insemination.
Lactating Holstein cows were used to determine if pregnancy rate from embryo transfer (n = 113) differed from contemporary control cows (n = 524) that were artificially inseminated (AI). Holstein heifers (n = 55) were superovulated with FSH-P (32 mg total) and inseminated artificially during estrus and subsequently managed under shade structures. On Day 7 post estrus, embryos were recovered, and primarily excellent to good quality embryos (90.3%) were transferred to estrus-synchronized lactating cows. Cows were managed under conditions of exposure to summer heat stress. Pregnancy status was determined by milk progesterone concentrations at Day 21 and palpation per rectum at 45 to 60 d post estrus. Pregnancy rates of cows presented for AI (Day 21, 18.0%; Days 45 to 60, 13.5%) were typical for lactating cows inseminated during periods of summer heat stress in Florida. Pregnancy rates of embryo recipient cows were higher (P<0.001) than those of control cows (Day 21, 47.6%; Days 45 to 60, 29.2%). Summer heat stress had no adverse effect on heifer superovulatory response, but it increased (P<0.05) the incidence of retarded embryos (</= 16 cells) and embryos graded as fair to poor quality. Increased pregnancy rate of recipient lactating cows indicates that the bovine embryo is sensitive to maternal heat stress during the first 7 d after estrus. Embryo transfer may bypass this period of embryonic sensitivity and provide an alternative to AI to partially circumvent heat stress-induced infertility in cattle.
Journal Article↗
A protocol for the recruitment and screening of semen donors for an artificial insemination by donor programme.
This study outlines a structured protocol for the recruitment and screening of semen donors for an artificial insemination by donor programme. One-hundred-and-ninety-one potential semen donors were assessed. A step-wise analysis of these potential semen donors is presented, reasons for and rates of rejection at each stage are documented and explained. The majority of the potential donors were rejected on the basis of unacceptable semen analysis. A simple, structured approach to the assessment of potential semen donors is proposed.
Humans↗
The value of artificial insemination with husband's semen in infertility due to failure of postcoital sperm-mucus penetration--controlled trial of treatment.
Artificial insemination with husband's semen into the cervical canal and uterine cavity (high AIH) was assessed by a randomized controlled prospective study in 46 couples whose infertility was due to failure of sperm mucus penetration, as defined by negative postcoital tests, after excluding all interfering female factors and men with sperm density less than 1 x 10(6)/ml. Seminal analysis was abnormal in 18 of the 46 men and sperm antibodies in semen were detected in 19 of the remaining 28 with normal seminal analysis. Overall, the cumulative conception rate after 6 months with AIH was 4.7 (SE 3.8)% and without treatment was 6.6 (SE 3.9)%. The results were unaffected by the findings on seminal analysis or by the presence or absence of sperm antibodies in semen. AIH appeared to be of no benefit.
Cervix Mucus↗
Community attitudes to artificial insemination by husband or donor, in vitro fertilization, and adoption.
Although reproductive medicine is rapidly advancing within society, few studies have been conducted in this area on the opinions and attitudes of people in the community. A survey of the attitudes of 104 Geelong residents, selected by a random sampling technique, was conducted, in order to assess community attitudes to adoption, artificial insemination using husband and donor sperm, and in vitro fertilization. The results indicate that attitudes in general are positive, supporting the pro-natalist bias of society. AID was seen as the most problematic technique used, and was given less support in general than the other techniques. A surprising number of respondents felt that single and homosexual groups should have access to these techniques. Further results are discussed, including those bearing on the possibility of establishing a National Register for AID donor-offspring information.
Adolescent↗
Artificial insemination using donor semen and the issue of secrecy: the views of donors and recipient couples.
The issue of secrecy and artificial insemination using donor semen has psychosocial, moral and legal implications. These implications are explored within the context of New Zealand AID practice, and particularly, recent legislation aimed at clarifying the status of the child. The results of two studies, one covering 37 donors involved in six AID programmes and the other covering 55 couples who had been accepted into one of the same six programmes, insomuch as they relate to issues of secrecy, are reported. Recipient couples and donors, while thinking that secrecy is important, have told other people-a not dissimilar situation to what occurred in the adoption field 25 years ago. Forty-one per cent of recipient couples and donors do not believe children should be told of their origins. A high 46% of couples had not yet decided if they would tell their child. Donors are almost equally divided over the child's right to non-identifying information about them. Donors are more likely than recipient couples to believe that the child who knows s/he has been conceived via AID will want information about them. Only 11% of donors and 5% of couples believe a child would want to know the identity of the donor, although for three quarters of both groups the issue is far from clear. Donors were not as opposed to the possibility of tracing occurring as some doctors suggest. Response to questions concerning the legal position suggests there is considerable confusion amongst both groups. The overwhelming majority of couples were intending to place the husband's name on the birth certificate, regarding him as the father.(ABSTRACT TRUNCATED AT 250 WORDS)
Adult↗
Screening of karyotype and semen quality in an artificial insemination program: acceptance and rejection criteria.
Semen quality and karyotype were screened in all men offering to be donors for an artificial insemination (AID) program. The criteria for accepting or rejecting semen have now been set with respect to this sample of the population. There was no evidence of differences between the pregnancy rates of the accepted donors. One of 172 potential donors with a clear medical history had a chromosomal abnormality, 4 had pericentric inversions of chromosome 9, and 14 had other heterochromatic variants. Of the recipients of AID, 5 of 196 women had chromosomal abnormalities, and 12 had heterochromatic variants.
Adult↗
Cryopreservation of semen in men with testicular tumour or Hodgkin's disease: results of artificial insemination of their partners.
After cryopreservation of semen from men with testicular tumours or Hodgkin's disease the success rate of artificial insemination of their partners was analysed. The cumulative probability of pregnancy at 6 months was 45%. The chance of pregnancy was greater when timing of ovulation was predicted with measurements of urinary luteinising hormone. Sperm density and sperm motility were also important in predicting the likelihood of pregnancy.
Adult↗
Fertility in bitches artificially inseminated with extended, chilled semen.
Sixteen bitches were artificially inseminated with either fresh, 24 h-chilled or 48 h-chilled extended semen over 38 estrous cycles. A commercial system for extending, chilling and transporting semen commonly used in the equine industry was used Pregnancy rates and litter sizes of the bitches inseminated with extended, chilled semen (19/20, 95%; litter size = 7.1) were not significantly different from those observed in bitches inseminated with fresh semen (17/18, 94%; litter size = 7.2; P > or = 0.89). These results show that a commercial system for extending, chilling and transporting equine semen is an attractive and efficient method of shipping canine extended chilled semen.
Analysis of Variance↗
Artificial insemination by donor: an alternative for single women.
Artificial insemination using donor spermatozoa (AID) has been known as a treatment for heterosexual couples where the husband has been found to be infertile. The first woman without a male partner wanting a child by AID was admitted to the fertility centre in 1981. In the literature, two categories of alternative requests, i.e. those from lesbian couples and those from single women, are treated as equivalent family structures since both lack a father figure. However, single women shoulder the responsibility for the child's upbringing alone, whereas in lesbian couples partners share this responsibility. Some of the objections raised to alternative types of parenthood therefore refer more to women not having a partner at all. Since 1981, 94 single women have asked the Fertility Centre of the Free University of Brussels to be considered for AID treatment. Data from this group of alternative requests have been collected. The aim is to draw up a profile of the single women who request AID, and to make a distinction between applicants who were accepted and those who were refused.
Adult↗
The study of psychological factors in couples receiving artificial insemination by donor: a discussion of methodological difficulties.
Artificial insemination by donor (AID) may be the only means by which many infertile couples are able to have a child. However, the treatment is not invariably successful and it is postulated in the literature that psychological factors may be implicated when conception does not occur. Further investigation is required to establish the nature of any relationship between psychological stress and conception after AID but designing an adequate study is confounded by many methodological difficulties. These include issues relating to ethics, recruitment, measurement and logistics. In this paper, such aspects are examined and the importance of research in this field for nursing is highlighted.
Ethics, Medical↗
Possible teratogenic effects of artificial insemination by donor.
Three trisomic offspring conceived by artificial insemination by donor (AID) were observed in a population in which a total of about 400 babies were so conceived. To test whether this excess represented a random fluctuation or a real effect of the AID procedure we surveyed, by questionnaire, a group of women who had born children conceived by AID. A significantly higher number of trisomic offspring were found than expected in a population with the observed age distribution. Further data are needed to test the validity of this observation.
Abortion, Spontaneous↗
Artificial insemination of beef cattle.
A system for the artificial insemination fo beef cattle was described. The system involved preparation of the cattle and facilities, visual oestrous detection twice a day, drafting each morning and insemination of oestrous cows twice a day. The AI program was evaluated during the course of the program and at pregnancy test 35 to 90 days after the end of the insemination period. The insemination period was from 25 to 60 days depending on efficiency, with programs from 25 to 35 days being favoured. Results for 12218 first inseminations (65.9%) and 2222 second inseminations (57.8%) in 56 AI programs compared favourably with results in dairy AI. Pregnancy rates in lactating cows (70.5%) were significantly higher than in nonlactating cows and heifers (66.1%). Overall efficiency of well-managed AI programs were represented by 63% of cows put into a program becoming pregnant in a 29-day insemination period. Seventy-two per cent of the cows put into the program were inseminated yielding an 88% pregnancy rate. The efficiency of visual oestrous detection was 95% but this estimate did not include false positives. Efficiency of AI programs were effected by management, nutrition, infection, inseminators, facilities and the origin and type of cattle put into a program. Environmental factors such as handling, stress and thunderstorms did not effect efficiency except via a nutritional effect.
Animal Husbandry↗
Vital statistics and reasons for disposal of United States and Canadian artificial insemination dairy sires.
Vital statistics were evaluated for artificial insemination sires leaving service during 1939 through 1974. Data consisted of 11,704 sires of six breeds. The major cause for leaving service was reproductive failure at a frequency of 32.5%; next ranked was undesirable characteristics of offspring with a frequency of 20.7%. Overall culling rate for low yields of daughters was 14.8%, but after 1965 this cause accounted for about 30%. Mean life span was 3.4 yr with small differences among years. Breed differences were detected for service life and causes for leaving service. Modifications of classic life table techniques are needed to reflect entry of sires into service at various ages and evaluation of vital statistics subsequent to 1974.
Age Factors↗