I found this which suggests there may be a very slight element of truth to this but it is much more likely to be a case of unrelated miscarriages being attributed to this by older 'wiser'
females who have no evidence of it being true... perhaps just in a bid to find answers that arent really there & to help people feel like things have been explained when in reality some things just cant be explained IYSWIM? (like great aunt Nelly who knows EVERYTHING and cannot be wrong about anything for instance)
I personally think you have nothing to worry about
especially given your first baby was a beautiful little girl and this only seems to apply to women who's 1st born was a boy xx
Reports by Nic Fleming,
Science Correspondent, in Prague
Women who have a son and go on to have multiple miscarriages are substantially less likely to be able to have a second child, according to new research.
Scientists who carried out a study of more than 300 mothers who later suffered repeated miscarriages found that those who had previously had a baby girl were almost three times more likely to be able to give birth again.
They believe that male immune system cells - which can remain in a woman's body for more than 20 years after she gives birth to a son - can trigger a reaction that makes having another baby more difficult.
Approximately one per cent of all women who become pregnant have three or more miscarriages.
About a third of these, or one in about 300 women, suffer from secondary recurrence miscarriage (SRM) - the loss of three or more pregnancies after a successful pregnancy.
Dr Henriette Svarre Nielson and colleagues at the University Hospital of Copenhagen presented findings of the new study at the annual European Society of Human Reproduction and Embryology conference in Prague yesterday.
Dr Nielsen said she believed that cells that pass through the placenta from a male foetus to the mother can increase the likelihood of her immune system rejecting later pregnancies.
"We observed that most of the women we were seeing in the clinic with recurring miscarriages who had previously had normal babies had boys.
"It is known that when a woman carries a male baby it can appear as strange to her immune system, and that up to 22 years later you can still find cells from her son's immune system in her body.
"We think that there is an immune response against genes from the male Y chromosome."
Dr Nielsen added that in at-risk women it was likely that the immune reaction triggered by a protein found on the surface of male cells was boosted to the point where it could later increase the chances of the body rejecting female foetuses too.
"It may be that the immune reaction spreads out to affect all children. The immune response gets bigger and bigger and more cells get attacked."
Dr Nielson and colleagues examined the records of 305 women with SRM treated at their unit between 1986 and 2005.
She stressed that most women's bodies were able to cope with male foetuses and that the additional risk of being unable to have a second child only applied to a small proportion of women, possibly with defective immune systems.jonathan isaby