do some men produce more x sperm,some more y sperm and some 50% x 50% y.giving more chance of certain sex?

[racheael76]

do all men produce 50/50 of each sperm giving chance of girl or boy (mixed family) and
do some men produce more x sperm lets say 79% x 21% y giving higher chance of a girl and

do some men produce more y sperm more chance of boys.
is this why some have male dominate families or girl dominate families? do you think all mens sperm is 50/50 or varies?

WTAF has this got to do with AIBU?

I always thought the conditions in a woman's uterus can sometimes favour male or female sperm, so not just down to the man?

Blimey, I think I need to lay down now

Its my theory i would love to know what people think am i being unreasonable thinking this theory or am i right what do you think ?

This again?

No. Men's sperm are 50/50 due to how they are formed.

I don't get why thesis an AIBU either.

One of the bigger surveys (families in New York) showed no essential difference to that which you'd expect on the mathematical 50/50 model. The one exception was that families with 3 boys were 50% more likely to have another boy than you would expect (9%, not 6%) but the sample size wasn't big enough to know if this was significant. Nor am I aware of other data on this, and what it shows.

Sperm are produced from spermatocytes - stem cells - which have two full sets of chromosome including 1 X, 1 Y. These eventually divide into two sperms, each with one full set of chromosomes, and either the X or the Y. So no, they produce equal amounts of each.

Gametes (sperm/eggs) are produced by meiosis so both X and Y sperm will be produced in equal numbers at first. They may not all survive or have equal chances of fertilising an egg though.

Hi there
WE shall move this to conception for you
Thanks

a healthy man may make 50:50, although I am not syre of that.

But I went to a lecture the other day where it was mentioned that men can be carriers of disease, or have a disease, which leads to one gender sperm being less viable than the other.

I might try to look it up if you're interested.

bigkidsdidit very interesting answer thank you i would love to know more.x

sorry i put this in wrong section thanks olivia for your help.x