Are the chances of getting a boy or girl equal?

Question

When a woman is pregnant, is the chance of having a girl or boy equal 50/50? Or are there like some biology stuff determining the odds?

In: Biology

Answer 1

Another question to this. Is a “boy family only” really true. I have a friend, he has four uncles (no aunts on Father’s site), has 2 brothers(no sister), 1 nephew and his wife got pregnant. To the question if it’s a boy or a girl he laughed and said that his family only gets boys. AND his wife gave birth to a boy…. Grandfather on the Father’s site doesn’t have sisters, too. How is this possible if it’s around 50/50????