IB Biology SL 2.4.7.7 IVF and reproductive ethics Question Bank

drugs used to down-regulate the menstrual cycle;

FSH injected to stimulate many follicles to develop;
HCG injected to cause the follicles to mature; eggs are harvested/extracted (from the follicles/ovaries); semen sample produced/collected; semen is processed to concentrate it / healthy sperm selected (swim-up test given);
ICSI/IntraCytoplasmic Sperm Injection where sperm is directly injected into egg when low numbers of motility is a factor; semen mixed with eggs in a dish/outside the body to allow fertilization;
incubated / kept at $37^{\circ} \mathrm{C} /$ allows embryos to develop (sufficiently for implantation);
dish examined to choose healthiest embryo; embryos placed in uterus/oviduct (using a catheter/long plastic tube); one/two/three/up to four (in some countries) embryos implanted; pregnancy test/scan used to see if procedure has been successful;
(used in cases of) blocked oviduct / low sperm count / need for genetic screening / infertility / cannot become pregnant / need for donor embryo;

Marking guidance:

[9 max]
Accept other reasonable situations. Full marks may be awarded only if an example is included in the answer.