ALERT

We are experiencing high call volumes in response to expanded COVID vaccination scheduling. Vaccine supplies in Idaho are limited. Please do not call St. Luke’s clinics directly regarding COVID-19 vaccination. Appointments are made through myChart as vaccine is available; we are not able to accommodate walk-ins. Unless you need to call for an emergency, you are encouraged to use myChart for questions and appointments at this time. Find additional information here.

toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Menstrual Cycle

Menstrual Cycle

Menstrual cycle: Lining of uterus thickens and egg is released
Menstrual cycle: Uterine lining is shed

During the follicular phase of the menstrual cycle, the lining of the uterus thickens to prepare for pregnancy. An egg becomes ready to be released inside a sac (follicle) on the surface of an ovary. During the luteal phase, the egg is released (ovulation). If the egg is fertilized by sperm, it may attach to (implant in) the lining of the uterus, and pregnancy begins. If the egg is not fertilized or does not implant, the lining of the uterus is shed as blood during the menstrual period (below), and the cycle starts over.

Current as of: November 8, 2019

Author: Healthwise Staff
Medical Review:
Sarah Marshall MD - Family Medicine
Martin J. Gabica MD - Family Medicine
Kathleen Romito MD - Family Medicine
Rebecca Sue Uranga MD - Obstetrics and Gynecology

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.