HI, thanks for using healthcare magic
Your blood groups would no affect your sexual interaction, your wife's periods , vaginal infections or affect the ability to conceive a baby.
It is much more common for couples to have different blood groups than to have the same group.
The lack of a monthly period would affect your wife's ability to conceive.
Irregular period can have different causes such as: (1) high levels of a hormone called prolactin
(2) emotional or physical stress
(3)abnormal levels of thyroid
(5)PCOS- this stands for polycystic ovarian syndrome
The doctor would likely do hormonal
blood tests and ultrasound
to determine if any of these is contributing to the irregular periods
I hope this helps