hormone

Oxytocin is a peptide hormone produced in the brain which is known as the 'bonding hormone' or the 'love molecule' due to its effects on relationship building, empathy and trust.

The buildup can lead to a variety of health issues, including increased risks of cancer, hormone disruption, fertility effects and damage to the brain and nervous system.

Testosterone levels must be "within natal female range... for an appropriate length of time so as to minimise any potential advantage", and hormone treatment must be verified annually.

She also campaigns on menopause awareness, after her changing hormones prompted her to highlight women's experiences with her work.

Then, they administered hormones related to oocyte development and succeeded in obtaining mature rat eggs.