Implantation bleeding: Pregnancy sign or period?
What is an implantation bleed? After fertilization, the fertilized egg (blastocyst) migrates through the fallopian tube towards the uterus and nests – like an egg in a nest (lat. nidus, nest) – in the lining of the uterus. This nesting is called nidation by physicians. What begins with the attachment of the blastocyst to the … Implantation bleeding: Pregnancy sign or period?