An embryologist is arranging cards showing the main stages of IVF. One card describes the transfer of one or two embryos into the mother's uterus.
What happens immediately before the embryos are transferred into the uterus?
Several mature eggs are collected from the ovaries.
Several eggs mature in the mother's ovaries.
The eggs are fertilised by sperm inside the ovaries.
The fertilised eggs develop into tiny balls of cells.
85 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.