Scientific reason for no girls in dh family? - Page 2

[nia82]

Interesting about some men whose X sperm just die off. I just know that some men are more prone to producing girls, especially in heavily polluted areas, pilots and such - they are exposed to more radiation and pollution and the Y sperm is less viable and hence they produce more girls. I think I read it in Toni Weschlers FAM book. There's research about it. But I have never heard of the opposite case, interesting.
DH's family has mainly boys with some girls, SIL has 2 daughters though and DH has one sister. We are all girls, but my cousins are 50/50.

[Galatea]

Originally Posted by lillymonster

we have the opposite, which is really weird. very few men. My mom's family had 8 kids, 1 boy, she herself had 5 kids, 1 boy. There are (counting my un-born child) now 11 grandchildren, only 3 boys out of the 11. My mom's sisters had mostly girl children, I am thinking 2 boys out of 8 women having kids.

What I am told that is also odd, is that my sister's all had same sex families - 2 girls, 3 boys, and the last with 4 girls. I have one girl so far. We are waiting to see what this on is, I am guessing another girl.

So we have no explanation because if it's the man the drives it, how did all the women get pregnant with girls?

If a woman has all girls, it is likely due to her own acidic chemistry. If a woman has all boys with the same partner, it is likely the man's sperm driving it.

[MaerynPearl]

DHs father is one of 7 children... 6 boys, 1 girl. All of those boys had boys and those boys have had boys... until DD.

Scientifically, sure maybe their male swimmers are stronger... but its also totally possible that the 50% chance hit male every single time.

[HopefulJo]

DH has a family full of boys here, too. He's one of 4 brothers, and we have 4 nephews. His dad is one of eight kids, and has more brothers than sisters, too. This is our first, and everyone will be shocked (and delighted) if it's a girl. I keep telling them they'll have to wait until August to find out!

[HeatherB]

My FIL was saying yesterday that he knows what he'd bet on if he were a betting man, for this baby's gender. I'm seriously tired of the "We only make boys" comments from their family. Bah!

In DH's family, in the last four generations - including my 3 boys - there are a total of 11 people. Total. 4 generations. (Ok, I don't have any info on DH's grandfather's brother's offspring.) My DH is an only child; he has ONE cousin on that side of the family. DH's dad is one of three boys. DH's grandfather is one of 3 boys. And that's all we know. If they'd had 4-10 kids per family, I'd feel more confident in the "we only make boys" thing. It is a curious thing, but it's not 100% predictive, kwim?

Anyway, it's interesting to hear that most men will make 50% of each X and Y. After my 3rd boy was born, we joked that we needed to have DH tested to see what he made. But I said that he probably would only make ONE X, and there it would be in the petri dish, never to be able to make a little girl! We're expecting baby 4 in November, and hoping that the slight statistical tilt back to opposite gender after 3 of the same, plus DH's advancing age, might help us knock his family for a loop.

[WTHamI?]

My former boss and his wife had 10 girls, no boys. She also had a late miscarriage and a stillbirth and both of those were also girls. So 12 girl pregnancies with zero boys. I have a hard time believing that is coincidence. His oldest two daughters now have children - also girls. It's interesting to hear the woman's ph may have something to do with it, maybe the women in their family aren't letting the Y swimmers through?

Of course this is also near the Hanford Nuclear Reservation so maybe his boys are getting nuked before they get there, who knows.

[MaerynPearl]

0 to 12 is still very much within the realm of always hitting girl and having nothing to do with science. Its a very very very small group comparatively.

I mean, with DHs family we are talking 3 generations of over 50 people with only 2 girls in there, one of which is the one currently baking in my tummy. Yet... there's no scientific reason for it and more likely than not, its just how it turned out.

[sk8boarder15]

Sounds like my dad's family! I was the one who "Broke the curse" though.

My grandpa had all brothers, then fathered 6 boys! Then my dad had me, the first granddaughter and the first girl in three generations, I think there were about 12 boys in the three generations before me!

On my moms side of the family, there is actually a genetic tendency towards girls that we actually know about. My grandma (mom's mom) had 8 children, 5 girls, 3 boys, all three boys had mental disabilities of some sort. We later found out that our family has a mutation on the x chromosome, causing most male pregnancies to end in miscarriage and the ones that do make it have a chance of a learning disability. It works like fragile X (moms may or may not be carriers and may or may not pass it on to their sons) but it is its own mutation, only in our family. My mom had 1 miscarriage, and an abortion (of twins) before i was born, so any of those easily could hav been boys. I actually do not know if I am a carrier, but my sister is not (she got tested) and has a healthy boy. My little boy is due in september and and I'm praying for the best! I didn't get tested because it would make no difference in how I treated my son.