The egg and the sperm unite in the fallopian tubes, also called oviducts, and a zygote is formed. The zygote begins to develop while it migrates from the oviduct to the uterine cavity. Once there, it fixates to the walls of the uterus and the embryo implantation is produced.
Implantation is the process by which the embryo, once it has reached the blastocyst stage, adheres to the endometrium, thus allowing the fetus to receive by blood doping the oxygen and nutrients it needs from the mother. This way it will be able to continue its development.
For such purpose, a necessary embryo-maternal dialogue occurs through a kind of root-shaped prolongations that extend to the cervical mucus and are produced by the embryo.
The implantation begins on the seventh or eighth day after the fertilization of the egg by the sperm and goes on until about the end of the second week.
The increase in hormones after implantation generates pregnancy symptoms. Usually they start later, but sometimes they can be noticeable at very early stages. Usually, women start noticing it later, around the 2nd-3rd week after fertilization. However, some women notice such symptoms previously.
Bleeding because of implantation usually occurs a few days after implantation. Although it may be confused with menstrual bleeding, implantation bleeding is characterized by a more fluid texture than that of menstrual periods. Its color can vary from rosy to brownish.
The length of this bleeding depends on each woman.
Other symptoms which may be remarkable if they occur when menstruation finishes are:
- One- to two-day cramping, similar to painful menstrual periods.
- Slight swelling of the breasts, especially around the areola and the nipple.
- Digestive disturbances because of diarrhea or constipation; heartburn.
- Constant urge to urinate.
- Sleepiness, especially after having eaten.
- Nausea or even vomiting, especially after waking up, usually from the second week onwards.
- Abhorrence of food, tobacco and certain smells.
- First food cravings, a larger number of foods but less nourishing.
Too-frequent observations of any type of sign or change in our organism, together with an unrestrained desire to have a child, can cause you to feel pregnancy symptoms even if you are not pregnant.
In any case, the best you can do is waiting at least 12 days after ovulation to take a pregnancy test and to answer your questions.