A lot of people think that if a girl provides sex during her period, she can’t have a baby. But it can be done for a girl to have a baby while she is bleeding. This can happen for a couple of reasons: Not absolutely all vaginal bleeding is a menstrual period. Sometimes a woman will have handful of vaginal bleeding at the time of ovulation — the time when she is most fertile. Girls who are ovulating occasionally have some vaginal bleeding which can be mistaken for a period.Tower’s group eliminated bacteria as one factor by comparing regular fruit flies to specimens born from eggs washed in antibiotic, raised within an axenic environment, and provided disinfected meals throughout their lives. A third band of flies grew up with bacterias and disinfected in adulthood. Co-author Paul Webster, director of advanced electron microscopy and imaging at the home Ear Institute in LA, utilized scanning electron microscopy to visualize structures resembling bacterias biofilms on the top of older flies. Tower and co-writer Chunli Ren, a graduate student, required bacteria samples from the inside and surface area of the flies throughout their life time, confirming that the axenically grown flies had been bacteria-free and that bacterias counts in regular flies increased significantly as the flies got old.