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Biomedical subjects

G Juez

Publications and source records attributed to G Juez.

At least 37 records · Page 2Linked to original sources
PubMed1983

Fertility regulation in nursing women: III. Short-term influence of a low-dose combined oral contraceptive upon lactation and infant growth.

The study was designed to test the short-term influence of a low-dose combined oral contraceptive upon lactation and infant growth when treatment was initiated at day 30 postpartum. The contraceptive tested contained ethinyl estradiol 0.03 mg and levonorgestrel 0.15 mg. Two control groups were formed by women who received either an oral placebo or an injectable placebo at day 30 postpartum. An exacting list of requirements for admission and continuation in the study was applied to all groups. The oral contraceptive group had a lower percentage of cases in exclusive breastfeeding at day 91 postpartum when compared to both control groups. Infants in the oral contraceptive group showed a significantly lower average absolute weight at days 61 and 91 postpartum and a significantly lower average daily weight increase during the first month of treatment when compared to both control groups. It was concluded that the oral contraceptive tested had a negative influence upon lactation and child growth.

Adult↗
PubMed1983

Fertility regulation in nursing women: IV. Long-term influence of a low-dose combined oral contraceptive initiated at day 30 postpartum upon lactation and infant growth.

The study was designed to test the long-term influence of a low-dose combined oral contraceptive upon lactation and infant growth when treatment was initiated at day 30 postpartum. The contraceptive tested contained ethinyl estradiol 0.03 mg and levonorgestrel 0.15 mg. Two control groups were formed by women who received an injectable placebo or a Copper T at day 30 postpartum. Women in the injectable placebo group received non-hormonal contraceptives at day 90 postpartum. An exacting list of requirements for admission and continuation in the study was applied to all groups. The oral contraceptive group had a significantly lower percentage of cases in full nursing from the 4th through the 10th postpartum month when compared to both control groups. The average absolute weight of infants in the oral contraceptive group was significantly lower at several ages when compared to the placebo group but not when compared to the Copper T group. No adverse side effects upon infant's health were detected. It was concluded that the oral contraceptive tested showed a moderate inhibitory influence upon lactation when treatment was initiated at the beginning of the second postpartum month.

Adult↗
PubMed1983

Fertility regulation in nursing women: V. Long-term influence of a low-dose combined oral contraceptive initiated at day 90 postpartum upon lactation and infant growth.

The study was designed to test the long-term influence of a low-dose oral contraceptive upon lactation and infant growth when treatment was initiated at day 90 postpartum. The contraceptive tested contained ethinyl estradiol 0.03 mg and levonorgestrel 0.15 mg. The control group was formed by women who chose non-hormonal contraception at the same postpartum time. Only cases who were in exclusive breast-feeding with a minimal infant daily weight increase of 20 g per day during the third month of age were included. The oral contraceptive group showed a significantly lower percentage of cases in full nursing from the 6th postpartum month and a significantly lower infant weight increase during the 4th month of age when compared to the control group. No differences were found in the absolute infant weight up to one year of age. No adverse side effects upon infant's health were detected. It was concluded that the oral contraceptive tested showed a moderate inhibitory influence upon lactation when treatment was initiated at day 90 postpartum.

Adult↗
PubMed1983

Growth pattern of selected urban Chilean infants during exclusive breast-feeding.

This report describes the growth pattern of healthy, low middle and low socioeconomic class Chilean infants during exclusive breast-feeding. Two-hundred forty-two infants who were on exclusive breast-feeding at day 30 postpartum entered the study. Of these, 59% were fully nursing at 6 months and grew at a normal rate without receiving either supplementary milk or nondairy food. Supplementary feedings were administered in 27% of cases because of suspected primary inadequate milk output and in 14% of cases for other reasons such as pregnancy, illness, maternal work, or self-prescription. Full nursing provided the highest rate of weight increase during the first 3 months of life and a greater weight gain for boys than for girls up to the age of 6 months. Gastrointestinal pathology, malnourishment, or hospitalization were rare events in this population. It is concluded that maternal milk alone, if produced in sufficient amounts, can maintain normal growth up to the 6th month of life. The study supports the choice of exclusive breast-feeding on demand plus child growth monitoring up to 6 months over routine prescription of supplements at earlier times particularly where supplement administration fails to meet individual requirements.

Adolescent↗
PubMed1982

Fertility regulation in nursing women. II. Comparative performance of progesterone implants versus placebo and copper T.

A clinical study was designed to test whether sustained administration of progesterone to nursing mothers could prolong lactation and delay the postpartum recovery of fertility. The hormone was administered by subdermal implantation of six pellets that each contained 100 mg of progesterone. This treatment was administered to 84 fully nursing women on day 30 post partum. Control groups were composed of 130 fully nursing women who received an injectably placebo, and by 125 fully nursing women who received a TCu 200 intrauterine contraceptive device. An exacting list of requirements for admission to and continuation in the study was applied to all groups. No pregnancies occurred in the progesterone-treated group from the second to the sixth postpartum month. This period coincided with the period of elevation plasma progesterone attributable to hormone released from the implants. The cumulative probability of pregnancy in the placebo group was 10.2 per 100 women at the sixth month. Treatment with progesterone did not change the duration of lactation or the rate of child growth, and no adverse effects were recorded. These results warrant further investagation of the use of progesterone as an alternative method to prevent conception in nursing women.

Birth Weight↗
PubMedDate not supplied

[Intrauterine growth in Chilean middle class newborn infants].

Intrauterine growth of 11,543 newborn infants, liveborn between 1978 to 1987 that met prospective selection conditions (without intrauterine growth retardation risk) and their data are reported. MBW and weight percentiles 10, 25, 50, 75, 90 from 26 throughout 42 week of gestational age are reported. Selection of cases was important in obtaining adequate percentiles of birth-weight vs gestational age. The intrauterine growth pattern herein reported is recommended for evaluation of chilean newborns, because it is different to that of some foreign countries and the studied sample seems representative of chilean babies.

Birth Weight↗
PubMedDate not supplied

[Intrauterine growth according to fetal sex and maternal parity].

Influence of fetal sex on intrauterine growth (by birth weight) was studied in 8,533 newborn infants (4,199 females and 4,334 males) without known risk factors. Similar effects of maternal parity were also evaluated in infants of the same cohorts (648 infants from multigestae women were excluded because of antecedent abortion, 3,291 were first born to primigravidae and 4,594 were born to multiparae mothers). Male infants mean birth weights were 180-228 g greater than those of female infants. Male infants weighed 3,340 g +/- 390 (mean +/- SD) and 3,643 g +/- 414 (mean +/- SD) and female babies: 3,210 g +/- 376 and 3,502 g +/- 393 (mean +/- SD) at 38 and 41 weeks of gestational age respectively. Mean birth weights of newborn from multiparae were 85-140 g higher than those from primigravidae. Babies from multiparae weighed 3,337 g +/- 393 (mean +/- SD) and 3,608 g +/- 418 (mean +/- SD) and babies from primigravidae: 3,202 g +/- 372 mean +/- SD) and 3,523 g +/- 384 (mean +/- SD) at 38 and 41 weeks of gestational age in each case. All of these data were statistically different at 38 throughout 41 weeks of gestational age. A correction is suggested for birth weight according to a graph of differences between general mean birth weight and those for multiparae, primigravidae, males and females.

Birth Weight↗
PubMedDate not supplied

[Congenital pulmonary lymphangiectasis].

Congenital pulmonary lymphangiectasis is a rare cause of severe respiratory distress in the newborn period and most of these patients die, usually within the first 24 hours of life. It may present as an isolated anomaly or it may be associated with other congenital abnormalities, most commonly cardiac in origin, as is the case of total obstruction of the pulmonary venous drainage. Congenital pulmonary lymphangiectasis may be also associated with lymphatic anomalies of other portions of the body or with other non-lymphatic, non-cardiac congenital malformations. Chest radiographs show more commonly that the lungs are hyperexpanded and present a diffuse interstitial reticulonodular pattern. The differential diagnosis from the radiological standpoint should include total anomalous pulmonary venous drainage and pneumonia. We present the case of a newborn infant with congenital pulmonary lymphangiectasis who died within the first 24 hours of life, emphasizing clinical, radiological and pathological findings.

Female↗