Is it true some couples can only have either all male or all female DC?

[maybemumm]

My friend is pregnant and her DP has two daughters from another relationship. She said the baby would be a girl because her DP only makes girls, and it’s just confirmed to be a girl.

Is it true that some couples (men, in particular, as I know it’s men who influence it) can only biologically make either female or male offspring?

Sperm contain an X or a Y chromosome and men contain a gene that determines which one. One version makes predominantly Y sperm, one version X sperm and one version a more balanced number.

So if your partner has the mainly X version, the odds of having just boys if you are only looking at a sample of under 10 is pretty high.

Same with my grandparents. Huge family, all girls. They lost several boys, some very late miscarriages, once live birth but died after a few days. They always thought there was something genetically that meant they couldn’t have boys. I don’t know the science behind it.

My cousin had 4 girls with his ex wife.

but they separated and they each had a boy with their new partners.

I don't think anyone is doubting that couples have both

Exh family, there is only one girl in 3 generations, ex inlaws had two boys & one girl, ex sil had two boys, we had a boy, nephew one had two boys, nephew two had two boys.

If a man has slow sperm, the chances are he will just have daughters. Boy sperm race ahead but die sooner, girl sperm are a bit slower but live longer, so with slow sperm the boys just die before they get to the egg.
I am one such daughter!

My friend's mum had this too - miscarried two boys but went on to have all daughters

In my exh family, themes have all got girls only, 17 girls in total, the women of the family have boys (with outside men of course). It's over 3 generations.

Well I have brothers and sisters, as do my children. So its obviously not true, unless you think nearly all women are unfaithful?

I mean statistically there are differently differences among families... I know some families that over multiple generations have more boys or more girls. our family its more boys.... everyone is desperate to have girls.

It's ok, no scissors needed, I can disprove this on behalf of the group. My DH only has one ball (lost one in childhood), and we have a DD and a DS

The chances of having a boy or a girl are 50 / 50,.every single time.

The chances of a man with 3 kids having all 3 be the same sex is 1 in 8, so quite common. The chances of that man's next baby being the same sex again is still 50 /50.

The chances of a man with 7 kids having them all be the same sex is 1 in 128, so we're still not out of the realms of possibility. And yes, the next kid will still be 50 /50

I have no idea about the science of it all but we are a family of primarily girls.

My gran was one of 9 girls
My mum was one of 6 girls
I am one of 6 girls

But of us 6 girls (me and my sisters) we have an even split of boys and girls

for the love of god

Have you seen the Derren Brown episode where he tosses a coin and its heads 10 times in a row?

I have two wonderful boys - however i have had five pregnancies, one of which was a late loss, a girl. I honestly believe I can’t ’carry’ girls - that may be something people don’t agree with, but what I’ve been through it’s what I honestly believe x

I've always wondered this as I had 2 miscarriages between my 3 DS's
Obviously I know the biology but I wonder if a woman's alkaline/ acid balance can influence too
Just my musings

No idea, but I know a couple who had 10 children - 5 girls and 5 boys.

The first 4 were girls and the last 4 were boys. If they’d stopped at 4 kids you’d assume they could only have girls, but the couple went on to have 50/50 gender split over the 10 children.

You can’t spot patterns in small numbers - the gender will be down to random chance.

My dad: 3 girls
His brother: 3 boys
His sister: 1 boy, 1 girl

My mum: 3 girls
Her sister: 2 boys

I've always found that really interesting!
I've had all girls so my sister is gutted because she thinks that means she'll only have boys 😂

My great-grandfather was the seventh of eight boys (no girls). He was called Giles Septimus and his younger brother was Alfred Octavius (that sounds posher than they were, they lived in Salford and worked on the docks!) GGF was known as Sep apparently.

But no girls. Their poor mother.

Sounds like it was a good choice on your uterus’ part 🤪

Just anecdotal, I don’t think there’s any research on it - but I have family in the Navy, and divers who spend a lot of time working at depth are much more likely to have daughters than sons. It’s more complicated than just X or Y so 50% chance.

I know a deep sea diver who says divers always have girls. Obviously if that’s true it’s something to do with the effects of the job.

Any deep sea divers know any different?

Interesting FlemishHorse. I’ve just seen your post. 🙈

I vaguely remember my A-level biology teacher telling us that the woman’s anatomy has something to do with it, so women who are wider inside tend to be more accommodating to female sperm, as male sperm are smaller and get lost easier, and ladies with narrower tubes are more easily accessed by male sperm…….no idea if it’s true though