Hormones
Oestrogen, mainly oestradiol, is produced by developing follicles. It thickens the endometrium and changes cervical mucus. During IVF monitoring, rising oestradiol levels alongside ultrasound help judge the ovarian response and the risk of OHSS.
Also known as: estrogen, oestradiol, estradiol, E2
Sources
- Healthdirect Australia (healthdirect.gov.au)
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists (ranzcog.edu.au)
Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.