Every human on Earth has been created through human sexual reproduction as the offspring of two parents. A male and a female must engage sexually for human reproduction to take place. The biological process is important for the continuation of human life on Earth. Once a male and a female fall in love and choose to have children, there are several steps that must take place to produce a child.
First, a boy and girl must first reach puberty, the time when bodies begin to change and become more mature. The male and female can now produce special cells for human reproduction. It is at this time when a young man and woman can have sexual relations to produce new offspring, a baby.
Next, the male and female must then have sexual relations; the man's penis will enter the female's vagina. Many of the sperm (sex cells) produced by the man swim and seek to enter the female egg cell. Each sperm cell and egg cell contain 23 chromosomes, which are the instructions for the new human. Only one of the sperm cells will fertilize the egg cell. Fertilization leads to the development of a new individual.
Following fertilization, the new human begins to grow and develop inside the mother's stomach. A nine-month term of pregnancy begins as the new baby immediately begins to develop. A 1-day baby is called a zygote, and during the first 2 months, the baby is called an embryo. From the 3rd month to birth, the baby is referred to as a fetus. During pregnancy, the baby continues to grow and develop, receiving air and nutrients from the mother. After about 9 months, the baby is born and ready to enter the world.
Human sexual reproduction is not a complicated process, but it is much different than asexual reproduction, which involves just one parent. Each parent during human reproduction passed along 23 chromosomes to make a new person. The hair color and eye color may be passed on by the mother and the shape of a chin and height from a father. Though everyone is human, offspring are not exact copies.
If humans were born using asexual reproduction, everyone might look alike. However, remember, as people grow and develop, the cells in the body are reproducing using asexual reproduction. For example, a new skin cell will look like dying skins cells, new blood cells will appear the same as dying blood cells, and this takes place with all the cells of the body.
Finally, once a person reaches puberty the body will begin to change. As a female, the body will have the potential to produce egg cells, and if a male, the body will begin to produce sperm cells. Whether they are used or not, they will die off and new ones will be produced by the body to replace them.
When parents have children, they must be ready to look after the child until the child becomes an adult. It is an important decision that all people must make when they choose to have sexual relations with another person.
In summary, there are two kinds of reproduction, asexual and sexual. Asexual includes just one parent and identical offspring, sexual involves two parents and the offspring will be similar but not identical. Human reproduction includes several steps beginning with sexual relations between a male and female leading to the growth and development of a new baby born approximately 9 months later.
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