A girl can’t get pregnant by wearing panties on top for a while. Pregnancy is an extremely complicated process, need to consider whether to have sex in the girl’s ovulation, whether the boy is the body ejaculation, and whether the sperm can be successfully combined with the egg and successfully implanted in the uterus and so on a series of factors. If a girl is wearing underwear, the penis of the boy can not directly enter the girl’s vagina to complete the ejaculation, that is to say, the two sides did not have a substantial relationship, the sperm and the egg can not be combined to form a fertilized egg, so the girl will not be pregnant.