implantation bleeding how far along
How Far Along Am I In My Pregnancy Based On Due Date (Pregnancy Calculator) Implantation of the blastocyst usually happens between 7 and 10 days after ovulation, or 21 to 25 days after the first day of your *last menstrual cycle* (LMP). The blastocyst cells continue to divide, and start to separate into two groups: one to form the baby and one to form the placenta to nourish the baby.