Pregnancy

Baby sex

The baby's sex is genetically determined. Everything is decided at the moment of conception when the woman's egg meets the man's spermatozoon .

Sexual chromosomes X or Y determine the sex of the baby. Since all the eggs carry the X chromosome, it is the spermatozoon - the carrier of the X chromosome or the Y chromosome - that is decisive.

During conception, the chromosomes, therefore the DNAs, of the two cells (ovum and spermatozoid) unite. The chromosomes, therefore the DNAs, of the two cells unite.

This is the 23rd pair of chromosomes that determines the sex of the baby:

  • XY for a boy. An X chromosome brought by the ovum of the mother, the Y chromosome brought by the spermatozoon of the man.
  • XX for a girl . An X chromosome brought by the ovum of the mother, the X chromosome brought by the spermatozoon of the man.

How does baby grow up in the belly?

How many weeks of pregnancy can you see baby's fingers? How much does it weigh in the 5th month? And when is he able to discern the flavors?
Test your knowledge!

Sexual differentiation

Then, during the development of the embryo, the organs will gradually be put in place. The external genitalia will differentiate progressively. It is generally towards the 15th-16th week of amenorrhea, that the sex of the fetus will be visible on the ultrasound.

The differentiation of the genitals is under the influence of fetal hormonal secretions, mainly under the influence - or not - of the male hormone secreted by the testicle in the future boy; and of course not secreted in the future girl.

At birth, in a very small percentage of babies, there are anomalies of genital development that will require the intervention of specialist pediatricians.

To see: ultrasounds during pregnancy in video

Throughout pregnancy, fetal development can be monitored by regular ultrasounds. Ultrasound is an examination that examines internal anatomy using high-frequency sound waves. Explanations in video ...

You want to react, to give your testimony or to ask a question? See you in our FORUMS Getting pregnant, Pregnancy or A doctor answers you !

Read also :

> All about fertilization
> In Vitro Fertilization (IVF)
> The best chances to get pregnant

Popular Posts

Category Pregnancy, Next Article

Back pain and pelvis during pregnancy - Pregnancy
Pregnancy

Back pain and pelvis during pregnancy

Back pain during pregnancy is a common pain in pregnant women. Pregnancy is the occasion for multiple physiological changes, including increased weight and elasticity of the tissues, which cause different functioning of the lumbar spine, and constraints on osteoarticular structures. Low back pain is frequently associated with gluteal pain
Read More
Oocyte donation - Pregnancy
Pregnancy

Oocyte donation

Oocyte donation is not yet widely practiced in France, and the population remains relatively uninformed about this technique. However, these donations allow - for specific indications - many couples to finally reach a long-awaited pregnancy . The intervention is quite simple and almost painless. It has been practiced for almost 25 years
Read More
Pregnancy: protect yourself from the sun - Pregnancy
Pregnancy

Pregnancy: protect yourself from the sun

While it is true that any pregnant woman needs a vitamin D intake, also called the "vitamin of the sun", it is nevertheless important not to abuse the sun during pregnancy. When we wait for a child, we are more sensitive to the risks related to the sun exposure: heat, skin spots, heavy legs
Read More
Sterility and infertility: the solutions - Pregnancy
Pregnancy

Sterility and infertility: the solutions

As mentioned, different treatments can be indicated. Among these: artificial insemination and in vitro fertilization. Artificial insemination Sperm is artificially inseminated directly in the woman (inside the uterus), or sperm of the spouse (IAC) when it has erection problems, if the sperm is not not fertile enough, in case of a problem related to the cervical mucus of the woman
Read More