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No, for the most part a boy cannot tell that a girl is menstruating simply by looking at her.

There can be some ways to tell by looking alone, for example if she is unfortunate enough to experience a leak while the boy is around or her menstrual pads are showing somehow. In some cases girls skin may worsen, such as acne break-outs on the chin, but this isn't true for all girls at all times.

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Where in the girl's body does the period blood come out?

Menstrual blood exits the girl's body through the vagina during her period. The blood comes from the shedding of the uterine lining, which occurs monthly as part of the menstrual cycle.


Where in the girl's body does the period blood come from?

Period blood comes from a girl's uterus. When a girl has her period, the uterus sheds the lining it builds up to feed an egg. When the egg isn't fertilized, the lining, which is made up of blood and clots, falls off of the walls and comes out of her cervix, the bottom of her uterus that opens into the end of the vagina, and then the blood flows down out of the opening of her vagina.


Can a girl be pregrenat on her period?

While it is less common, it is still possible for a girl to become pregnant during her period. Sperm can survive in the body for up to 5 days, so if a girl has a short menstrual cycle, ovulation can occur shortly after her period ends. It is always best to use protection to prevent unwanted pregnancies.


What happens when a girl gets her period?

When a girl gets her period, blood comes from her vagina and she gets a bloated uterus, plus terrible cramps. When girls get their period, she must wear a tampon, or a pad. A pad is a liner that you put in your underwear. A tampon is something that a girl puts into her vagina.


Can a guy cause a girl's period?

No, a guy cannot directly cause a girl's period. Menstruation is controlled by hormone levels in a girl's body and is a natural part of her menstrual cycle. However, stress or changes in routine can sometimes affect a woman's menstrual cycle.

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