OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

Which hormones are administered to women before egg collection in IVF?

1. Progesterone and Estrogen

2. LH and Testosterone

3. FSH and LH

4. FSH and Estrogen

The correct answer is: FSH and LH

In the context of IVF (in vitro fertilization), specific hormones are administered to help stimulate the ovaries to produce multiple eggs rather than the single egg that typically develops during a menstrual cycle. The correct answer involves the administration of FSH (Follicle Stimulating Hormone) and LH (Luteinizing Hormone). FSH is crucial for encouraging the growth and maturation of ovarian follicles, which are fluid-filled sacs containing the eggs. Higher levels of FSH induce the ovaries to produce more than one egg, maximizing the chances of successful fertilization during the IVF process. Meanwhile, LH supports the final maturation of these follicles and triggers ovulation, making it vital for the timing of egg retrieval. Other options suggest the use of hormones like progesterone or testosterone, which are not typically administered for the purpose of stimulating egg production in this context. Progesterone is involved in preparing the uterus for potential implantation of an embryo, while testosterone does not play a direct role in the female ovulation process. Hence, the combination of FSH and LH effectively prepares the ovaries for egg collection in IVF protocols.