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Literature DB >> 1236773

Luteinizing and ovulatory action of oestradiol in the pregnant rat.

Abstract

Oestradiol injection on Day 10 of pregnancy in rats, resulted in either ovulation or luteinization in 50% of cases on Day 12. Cytological data showed that the number of pituitary LH cells decreased significantly on Day 11 in all oestradiol-treated animals whether responsive or not to oestrogen by ovarian modifications, while the number of pituitary FSH cells only decreased significantly in females with characteristic ovarian signs of preovulation. Bioassay of pituitary FSH confirmed the cytological data. It is concluded that ovulation and luteinization only occurred in the pregnant rat when oestradiol triggered off a synchronous release of LH and FSH.

Entities: Chemical Species

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Year: 1975 PMID： 1236773 DOI： 10.1007/bf00220001

Source DB: PubMed Journal: Cell Tissue Res ISSN： 0302-766X Impact factor: 5.249

24 in total

6. [Modification of gonadotropic cells and of the FSH content of the pituitary gland during provoked ovulation in female rats].

Authors: J Roos
Journal: Acta Endocrinol (Copenh) Date: 1969-12

Luteinizing and ovulatory action of oestradiol in the pregnant rat.

1. FLUCTUATIONS IN PLASMA LUTEINIZING HORMONE CONCENTRATIONS DURING THE ESTROUS CYCLE OF THE RAT.

2. Assay of the follicle stimulating hormone based on the augmentation with human chorionic gonadotropin.

3. OVARIAN CHANGES DURING PREGNANCY IN THE RAT.

4. [Comparison, in 2 races of rats, of 2 methods of determination of folliculostimulin].

5. [New method to determine folliculostimulin (FSH). Comparason with Steelman and Pohley's method].

6. [Modification of gonadotropic cells and of the FSH content of the pituitary gland during provoked ovulation in female rats].

7. Daily measurement of pituitary LH content during pregnancy in the rat: do cyclic changes persist?

8. Ovarian follicular development and pituitary FSH and LH content in the pregnant rat.

9. Luteinizing hormone levels in pig, cow and rat blood plasma during the estrous cycle.

10. Pituitary FSH concentrations in the rat during the estrous cycle.

1. Ultrastructural changes of pituitary gonadotropic cells in estrogen-treated pregnant rats.