A–Z Glossary

Corpus luteum

The corpus luteum is temporary ovarian tissue that produces progesterone after ovulation and helps support the early pregnancy.

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How hormones cause pregnancy symptoms

How hormones cause pregnancy symptoms

The hormonal switch that starts pregnancy Hormonal changes in early pregnancy begin soon after implantation. The embryo’s trophoblast tissue produces human chorionic gonadotropin, or hCG, which signals the corpus luteum to keep making progesterone. That early progesterone support stabilizes the uterine lining so the pregnancy can continue. At the same time, estrogen rises, and both […]