You are correct. Your girlfriend is not pregnant if she had her period.
The menstrual cycle is regulated by a fine balance of hormones. In the absence of a pregnancy, the hormones trigger the shedding of the lining of the uterus. This is what you see in the menstrual flow or blood of a period. When a woman becomes pregnant, the hormones trigger the lining to stay intact, so the fertilized egg can implant and develop.
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Hello anon1337,
You are correct. Your girlfriend is not pregnant if she had her period.
The menstrual cycle is regulated by a fine balance of hormones. In the absence of a pregnancy, the hormones trigger the shedding of the lining of the uterus. This is what you see in the menstrual flow or blood of a period. When a woman becomes pregnant, the hormones trigger the lining to stay intact, so the fertilized egg can implant and develop.
Regards,
February 23, 2015 - 10:11amMaryann
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