Implantation Pregnant

Reviewed by Sharon LaMothe, Infertility Specialist

In order for implantation to take place, conception and fertilization must occur first. Implantation happens early in the pregnancy stage when an embryo adheres to the lining or wall of the uterus. In doing this, the fetus receives the oxygen and nutrients from the mother to be able to grow.

The Process

A fertilized egg begins producing hCG immediately. Pregnancy tests detect the hormone hCG to determine pregnancy. Since it takes 7-14 days for the egg to travel to the uterus from the fallopian tube, pregnancy tests can be done multiple times to determine if you’re pregnant. As the embryo travels to the uterus, it is multiplying and reproducing cells at an extremely high rate, and growth begins right away.
Trophoblasts are cells forming the outer layer of a blastocyst, which provide nutrients to the embryo and develop into a large part of the placenta. The trophoblast proliferates and differentiates into 2 cell layers at approximately 6 days after fertilization for humans. When implantation happens, bleeding may occur which results in mild spotting, but is generally minor and temporary.