Uterus
A hollow organ, the uterus is shaped like a pear and is normally about three inches long. The lining of your uterus, known as the endometrium, is velvety and rich in bloody tissue. Sitting right in the middle of your reproductive organs, the uterus, or womb, can hold only about a teaspoon of liquid ordinarily. When you are pregnant, it expands to the size of a watermelon to hold your growing baby. the amniotic fluid, and the placenta. Continually being renewed, the lining of your uterus builds up in response to messages sent by your hormones and then sheds itself once a month during your menstrual period when you don’t get pregnant. During the first half of your menstrual cycle, estrogen makes your endometrial lining thicken. As your ovaries release eggs midway through your monthly cycle, progesterone takes over and helps your body get ready for a possible pregnancy If no fertilized egg finds its way to your womb, the endometrium falls apart and you have a period. Your hormone levels are at their lowest during that very first day of your period.
Ectopic pregnancy
When the fertilized egg doesn’t travel all the way to the uterus for implantation in the endometrial lining. the result can be what is called an