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When the sperm meets the egg. The sprem contains the gender in the form of an x or y chromosome

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17y ago

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How many weeks pregnant is the gender of the fetus formed?

gender is determined at the moment of conception, however it isn't until around the 16th to the 17th week of pregnancy that the sex of the fetus can be determined by ultasound.


Is your fetus a female during the first trimester of pregnancy?

Your fetus' sex is determined at fertilization. However, the external genitalia don't start developing until the 11th week of gestation, but will still not be visible on ultrasound.


What best describes what happens to a developing fetus during third trimester?

the organs grow larger


When can you determin a babys sex while pregnant?

The baby's gender can usually be determined by ultrasound in the mid to late second trimester of the pregnancy. The baby's gender usually begins to develop during the latter half of the first trimester (about 8 weeks).


What trimester does the fetus accumulate body fat and mineral stores?

3rd trimester


During which trimester do fingers and toes develop in a human fetus?

Fingers and toes develop during the first trimester of pregnancy in a human fetus.


What trimester is the fetus most susceptible to the detrimental effects of alcohol on development?

the first trimester


Does heartbeat of baby tell if baby is boy or girl in humans in first trimester?

No, the heartbeat of a baby in the first trimester does not indicate the baby's gender. The sex of the baby is determined by the chromosomes inherited from the parents. A fetal ultrasound is typically used to determine the baby's gender.


When we can determin foetal sex?

Most often the gender of a fetus is determined by looking at the genitals on an ultrasound. For a more reliable answer, expecting parents can use chorionic villus sampling or amniocentesis. However, a new study has found that a simple, non-invasive blood test will be able to reliably determine the gender of a fetus at 7 weeks. The blood test is currently used in Europe and will probably be available in the US in 2012.


What trimester in pregnancy can you figure out the gender of the baby?

2nd trimester


When the cow fetus begin to demand feed?

At the third trimester.


When does a teratogen affects the fetus most seriously?

in the first trimester