Progesterone in oral contraceptive pills primarily works to inhibit ovulation, preventing the release of eggs from the ovaries. It does this by suppressing the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland, which are essential for the ovulation process. Additionally, progesterone thickens cervical mucus, making it more difficult for sperm to reach and fertilize an egg. It also alters the uterine lining, making it less receptive to implantation, further preventing pregnancy.
So, the correct option is (A): To inhibit ovulation
LIST I | LIST II | ||
A | ZIFT | I | Transfer of an ovum from a donor into the fallopian tube of another female |
B | GIFT | II | Sponge Semen collection from husband/healthy donor is artificially introduced into the uterus of the female |
C | IUT | III | Transfer of zygote or embryo of upto 8 blastomeres into fallopian tube |
D | IUI | IV | Transfer of embryo with more than 8 blastomeres into uterus Choose the correct answer from the options given below |
List I | List II | ||
---|---|---|---|
A | Robert May | I | Species-Area relationship |
B | Alexander von Humboldt | II | Long term ecosystem experiment using out door plots |
C | Paul Ehrlich | III | Global species diversity at about 7 million |
D | David Tilman | IV | Rivet popper hypothesis |
List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |
Read More: Reproductive Health