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D Propping

Publications and source records attributed to D Propping.

24 records · Page 2Linked to original sources
PubMed1975

Scanning electron microscopy of cervical mucus crystallization.

The crystallization phenomenon of human cervical mucus was studied with the scanning electron microscope. Changes in the conformation of the crystals, crystal conglomerates, and ferning patterns occurred almost daily. During the very early and late stages of the cycle two types of crystals could be found, one columnar and the other flat. At the other times, the columnar crystals were absent and the flat crystals changed their shape to cuboidal. During the follicular phase, these cuboidal crystals were initially located in small groups, then in parallel rows, and finally in three types of ferning patterns, one seemingly typical for the time of ovulation. These patterns reversed during the luteal phase of the cycle. The scanning electron microscope appears to be an extremely useful instrument for the evaluation of these phenomena.

Body Temperature↗
PubMedDate not supplied

Prognostic value of the sperm-penetration-meter test according to Kremer.

An eighteen month follow up of 84 couples with unexplained infertility was analysed to determine the significance of the sperm-penetration-meter test (SPM-test). Pregnancy occurred independently of treatment in 16 couples (19%). The fertile and infertile group displayed no difference in the classical semen parameters such as volume, density and morphology. Only motility was slightly depressed in the infertile collective. The penetration quality was assessed at 2,4 and 24 hours incubation time according to Kremer (1980). Of all parameters only the two- and four hour values showed a significant, although poor correlation with the pregnancy rate (r = 0.32; p less than 0.01). Furthermore, the fertile group achieved twofold more positive results after two and four hours incubation (75% and 69%) than the group with persistent infertility (34% and 31%). In both collectives more than 90% of the 24 hour values were negative and thus insignificant. From all conventional semen parameters motility had the greatest prognostic point of view the results of the SPM-test bear the greatest significance during the first four hours.

Cervix Uteri↗
PubMedDate not supplied

[Cryopreservation of human spermatozoa--evaluation of 93 semen depots].

Cryopreserved semen depots from 93 patients who had terminated contract with the CRYO-BANK-KREFELD were evaluated for prefreeze quality and post-thaw motility after a few days and after long-term storage (mean = 44 month). 2/3 of these patients had onkological disease. Only 20% of the ejaculates were normozoospermic and showed motility after thawing of more than 20%. The average recovery rate after long term storage was only 28% and revealed a significant decrease with time of about 20%. The concentration of motile spermatozoa, especially in patients with testicular cancer (x = 2.1 mill/ml), was so much reduced one must assume that in the most cases of semen banking there was no chance to achieve pregnancy.

Cryopreservation↗
PubMedDate not supplied

[Crossed sperm-penetration-meter test. Prognostic value in male subfertility].

57 infertile couples with "unknown" or "therapy resistant" infertility were investigated by the double crossed sperm-penetration-meter-test (SPM-test). The results of the SPM-test were compared with the results of the postcoital-tests, the duration of infertility, and the male and female diagnosis of infertility. Postcoital tests and SPM-tests showed only in 63% of cases corresponding results. The ability of the spermatozoa to penetrate cervical mucus was directly depending from the number of progressively motile spermatozoa per ml, and no connection could be found between the results of the SPM-test and the gynecological findings. The investigations showed that the primary diagnosis of infertility can be extended by the SPM-test respectively in many cases of so-called "unknown infertility" where a disturbed spermatozoa-mucus-interaction has to be postulated.

Cervix Mucus↗