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Results for “Ovulation Detection”

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At least 991 records · Page 55Linked to original sources
PubMed1980

Optimal features of basal body temperature recordings associated with conceptional cycles.

Oral basal body temperature (BBT) recordings of 46 women that conceived by donor insemination and who had midcycle monitoring of luteinising hormone (LH) were analysed to establish features associated with an optimal cycle. All cycles exhibited a biphasic temperature shift associated with the follicular (mean + SD, 36.5 degrees C +/- 0.22) and luteal phases (36.8 degrees C +/- 0.19). Whilst a mean body temperature rise occurred on Day +1 when all cycles were analysed, individual patterns were seen at ovulation including no change or a decrease in BBT between Day 0 and Day +1. The BBT of the postovulatory phase was stable and only 4.5% of the 644 observations made showed a change of more than 0.2 degrees C from day to day. It was concluded that the BBT charting has limitations when used to recognize the day of ovulation, and that some variable patterns of the early luteal phase are consistent with conception. Finally, optimal luteal phases demonstrated remarkable stability.

Body Temperature↗
PubMed1981

Neuroendocrine control of human ovulation.

Ovulation, defined as the release of a mature oocyte from a ruptured Graafian follicle at the surface of the ovary, is the culmination of the process of follicular maturation. The latter is under the synergistic influence of the pituitary gonadotropins, follicle stimulating hormone (FSH), and luteinizing hormone (LH), the secretion of which is, in turn, stimulated by the hypothalamic decapeptide, LH-releasing hormone (LH-RH). There is a complex interrelationship between the ovarian steroid hormones, estradiol and progesterone, and the gonadotropins, with estradiol exerting both negative and positive feedback effects on the hypothalamo-pituitary unit. Ovulation is triggered by a surge of LH which results from at least two estradiol-induced phenomena, increased hypothalamic production of LH-RH and increased pituitary responsiveness to releasing hormone. Ovulation occurs 16-17 hours following the LH peak and the probability of conception following an act of coitus appears to be maximal 1-2 days prior to ovulation itself. States of anovulation are frequently seen in association with hyperprolactinemia whereas ovulation may be delayed under a variety of circumstances.

Adult↗
PubMed1981

The hormonal and ecological correlates of lactation infertility.

Some factors that may influence the results of studies of breastfeeding behavior in different cultures are identified. Findings of some of the demographic studies of rural areas in the so-called less developed nations are contrasted with studies in urbanized areas of such nations, as well as with studies from developed nations. A review of the physiology of lactation, specifically the role of prolactin is given along with some preliminary findings from the author's ongoing research in Australia.

Amenorrhea↗
PubMed1981

Natural family planning: postpartum period.

The length of the postpartum anovulatory period was studied in 200 mothers by means of endometrial biopsy, basal body temperature, vaginal cytology, and cervical mucus. The occurrence of the first ovulation and the first bleeding after childbirth are analyzed in relation to the type of nursing. The characteristics of 408 postpartum menstrual cycles are studied, by means of the same methodology. The shortest anovulatory period for nonnursing mothers was 36 days; for partial nursing mothers, 40 days; and for full nursing mothers, 70 days. The first postpartum bleeding appeared to be preceded by ovulation in 41% of the full nursing mothers, 75% of partial nursing mothers, and 91% of nonnursing mothers. Postpartum cycles were significantly longer and showed a luteal phase significantly shorter than control cycles, especially when the mother was fully nursing.

Biopsy↗