Module 12 - Ovarian Cycle + Pregnancy

Follicular Phase

Primordial - simple squamous

Primary - cuboidal

Secondary - antrum + cumulus mass

Graafian

Ovulation Phase

Graafian ruptures

Secondary oocyte released

Fimbriae

Cilia

Surround Secondary Oocyte After Release

Zona pellucida - inner ECM

Corona radiata - outer granulosa cells

Luteal Phase

Granulosa cells

Enlarge + divide

Corpus luteum

If Fertilised

Corpus luteum develop

HCG maintain

FSH - Function

Granulosa cells - follicle development/maturation

Increase oestrogen

LH - Function

Final maturation + ovulation + formation of corpus luteum

Thecal cells - androgens

Increase oestrogen

Low Oestrogen Levels

Inhibit FSH + LH

High & Sustained Oestrogen Levels

FSH + LH surge

Fertilisation - Where

Ampulla

Implantation - Where

Uterine wall

Oocyte Viability

24 hrs after ovulation

Sperm Viability

6 days in female tract

Ectopic Pregnancy

Implantation outside uterine cavity