Fertility Glossary

Corpus luteum

The structure left in the ovary after an egg is released.

The corpus luteum produces progesterone to support the early pregnancy. After egg collection it may not function normally, which is why progesterone support is prescribed.

Related terms

Progesterone

The hormone that prepares and maintains the uterine lining.

Luteal phase

The second half of the cycle, after ovulation.

Luteal-phase support

Progesterone, sometimes with other medication, given after transfer.

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