Now, knowing the features of female reproductive cycles, it is easy to understand at what time a biochemical pregnancy can occur. With a standard 28-day cycle, this occurs on days 14-16 from the first day of menstruation, that is, actually immediately after ovulation. Of course, we are not talking about any signs of pregnancy at this stage. The woman continues to live her usual life, not even suspecting that a fetus is being born inside her.
Real pregnancy is still a long way off. Not every biochemical pregnancy ends in an actual pregnancy. The most difficult and exciting period lies ahead - the journey of the fertilized egg from the ampullary part of the ovary to the uterus. The distance that the embryo must overcome is about 10 cm, and the zygote (embryo) does not have the ability to move independently. The movement occurs due to muscle contractions of the tube itself and the movement of the cilia of its epithelium.
In order for the embryo to successfully reach the uterine cavity, the fallopian tube must be passable along its entire length. Unfortunately, the patency of the pipes is often impaired due to adhesions resulting from chronic inflammatory processes.
In this case, there are two options:
1. The first and most favorable one is that the embryo dies in the tube, and the woman’s next menstruation arrives on time. This is how tubal infertility manifests itself. For women with such a problem, assisted reproductive technologies (for example, IVF - in vitro fertilization) are an excellent chance for long-awaited motherhood.
2. The second, worst option is a tubal (ectopic) pregnancy.