IVF uses hormone treatment, egg collection, fertilization outside the body, embryo culture, embryo transfer and follow-up testing for pregnancy confirmation.
Coverage 2014–2023 · Updated 16 Jul 2026
IVF treatment temporarily takes control of normal reproductive hormone signalling so artificial hormone doses can induce superovulation.
Normal pituitary hormone secretion is first suppressed to prevent an uncontrolled ovulation. Carefully timed FSH-like stimulation matures several follicles, and an LH-like trigger completes egg maturation before collection.
Suppress normal cycle → stimulate multiple follicles → trigger maturation → collect oocytes → fertilize outside the body → culture embryo(s) → transfer selected embryo(s) to uterus.
Producing several mature oocytes in one controlled cycle gives more opportunities for fertilization and embryo selection than the usual release of one oocyte.
Superovulation increases the number of available oocytes but does not guarantee fertilization, implantation or live birth.
This objective is assessed through structured response, commonly using Outline.
Outline
Build the answer around this relationship: FSH stimulation is used to produce more eggs than in a normal cycle.
Listing IVF steps but omitting either hormone stimulation, egg collection, external fertilization or embryo transfer.
Representative question
Embryos that are produced by in vitro fertilization can be screened for genetic disease. Outline the process of in vitro fertilization, including one example of a situation when it is used.
Core D3.1 route: reproduction creates offspring, gametes or pollen move, fertilization or germination follows, and the consequence is variation, embryo formation, seed production, or successful early growth.
Core D3.1 exam questions usually combine reproduction strategy with gamete formation, fertilization, human cycles, IVF, plant pollination, or seed germination. Treat each answer as a route: name the process, say what moves or changes, then give the biological consequence.
