Missed Menstrual Periods Anatomy
To better understand amenorrhea, it helps to understand the anatomy of the uterus and cervix.
The cervix is a short tube that forms the opening and lower part of the uterus. The cervix lies in the top portion of the vagina. Sperm enter through the cervix to combine with an egg in the uterus. A newborn is delivered through the cervix and vagina from the inside of the uterus.
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