Please choose the correct ending to complete the given sentence: Youth: [header] How to tell your mom about your period [title] Learn what having your period means. [step] The menstrual cycle is a monthly process your body undergoes in preparation for pregnancy. In the beginning of the cycle, your body creates more estrogen, which causes the lining of the uterus to thicken with blood and mucous.

Ending1: At the same time, the ovaries release an egg. An egg that gets fertilized by male sperm would attach itself to the thickened uterine wall. Ending2: It also prevents the muscles from contracting, which creates the formation of urethra, which is the uterus. This formation can lead to cramping, and may result in spotting on the m, such as reproductive problems. Ending3: When you develop menstrual periods, your body will produce every menstrual hormone necessary to produce a more fertile egg. The mate is often done in my legs, which can lead to instipation. Ending4: This allows you to understand what is causing your menstrual period to be irregular while you're pregnant. [substeps] This can be accomplished by expressing your feelings through a language that depicts your emotional response to your period.

Answer format: ending1/ending2/ending3/ending4