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Which parent determines the sex of a child?

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The father provides an X or Y chromosome; the mother always provides an X chromosome. Therefore, the sex of the child is determined by the chromosome of the individual sperm that fertilizes the egg.

Male offspring carry XY chromosomes; female offspring carry XX chromosomes.


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  • the father deposits the semen containing sperms in the vagina of mother. ideally the X and the Y sperms are in same number (this is rarely the case).

  • the germ cell in father's testicle initially divides into 2 cells. one of which is Y sperm responsible for male child. second one is X sperm responsible for female child. These cells then each divide in 2 these 2 cells further divide in 2 each producing 4 of one kind. this process goes on and on to produce 50 millions to 150 millions sperms in the semen. Half of them are Y sperms and Other half are X sperms.

  • If the X sperm unite with female egg then a female child is born.

  • If Y sperm unite with female egg then a male child is produced.

  • As same number of Y and X sperms are deposited in the vagina; which type of sperm ultimately will unite with female egg depends on the conditions of female reproductive system. Whether the condition is favorable for the rapid and safe movement of X sperms or the Y sperms.

  • The Y sperms are very delicate and are easily get destroyed by acidic and toxic environment of vagina. Thus if the vagina is very acidic most of the Y sperms are destroyed the rest may get immobile and not fit to swim in the cervical canal.

  • The X sperms are stronger and can withstand the acidity and toxicity better.

  • Thus if the medium of the reproductive organ mainly vagina, cervix, uterus and fallopian tubes is not favorable then the Y sperms get destroyed or immobile and the surviving X sperms swim in to unite with X egg of the woman to produce female child. This is why failure of family planning method like condom, spermicides, jelly, or withdrawal mostly results in female child. Similarly women having vaginitis, cervicitis, leucorhea, candida infection, cervical erosion almost always produce female children.
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Which parent determines the sex of the baby?

I don't think that is known with any degree of certainty. Many factors influence the sex of the baby, including the regularity of intercourse, even the water supply - yes, rea

What and when is the sex of a child determined?

At the moment the egg is fertilized by the sperm the gender is determined.   At a ultrasound checkup they can tell.

Does the mother determine the sex of the child?

No the mother only has a single sex chromosome, an X chromosome. The father is the one who determines the gender of the child. They could contribute either an X or Y chromosom

Which parents determine the sex of a baby?

The father's genetic contribution determines the sex of the baby. Women have XX chromosomes, men have XY (this is part of the definition of female and male). The male provides
In Uncategorized

What determine the sexes of the child in human?

 In human beings, the females have two X chromosomes and the males  have one X and one Y chromosome. Therefore, the females are XX and  the males are XY.   The gametes,
In Science

What are chromosomes that determine the sex of a child?

There are two kinds of sex chromosome X and Y that result in two different sex types: XX in females and XY in males. A child will always get a X chromosome from their mother,