Biology is the study of life through which it produces a phenomenon that affects all living beings: plants, invertebrates and mammals. Fertilization
Fertilization is a biological process characterized by the union of two cells: the male gamete and the female gamete, which, in turn, generate the first cell of a new individual .
It should be noted that the fusion of two cells (an egg and a sperm) produces another cell, called the zygote. Fertilization therefore involves the beginning of a new life.
Stages of human fertilization
When sperm are introduced into the vagina at the time of intercourse, they are directed towards the fallopian tubes and survive there for up to 72 hours. Fertilization is then designed to respect sex between a man and a woman.
Among the millions of sperm produced, only one can penetrate the egg and fertilize it. At the moment of union, the sperm unites its nucleus with the gamete and both provide their genetic information to the zygote.
The next step is the journey from the fertilized cell to the uterus
The permanent implantation of the egg is carried out seven days after fertilization, after which the embryo begins to develop in the woman’s placenta, which will serve as a nutrient for the fetus during its development. Once this process is consolidated, a woman’s hormones begin to give off signals (such as nausea) and show signs that she is pregnant.
in vitro fertilization
Some people have had difficulty achieving success at the time of fertilization: this is called sterility. This limitation has been resolved in recent decades through in vitro fertilization, so there are already thousands of people who were born through this technique known by its acronyms as IVF . This procedure is very positive for facilitating pregnancy in some circumstances, as well as preventing the transmission of some hereditary diseases. However, artificial fertilization is questioned when what is intended is to create a programmed human life, the so-called “test tube babies”.
The scientific study of fertilization has some moral and legal consequences. The fertilization of technical possibilities provide a number of wonder that are easy to answer: about the legitimacy of the sex selection, genetic modification or the choice of an embryo in function of their genes.