system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
What is the effect of Progesterone-only pills?
assistant
The correct answer is  Ref. KDT. Page. 343
Progestogen-only pills have multiple biological effects on the female body.
Multitude effect of POP:

Inhibition of follicular development
Inhibition of ovulation
Suppression of corpus luteum formation
Changes in the nature of the cervical mucus which inhibits the passage of sperms into the uterine cavity – Thickening of cervical mucous secretion
Effects on the endometrium which affect implantation – by making it thin