i got one case in may home town..when the women period once a year and sometimes non at all..(STRICTLY NO OFFENCE) her figure size quite big and the consequences is she don't even know she is pregnant for her 1st time (married for 7 years of course)..she got very stomach ache then she go to the hospital nearby for check up..then the doctor said you are pregnant and about to deliver and not stomach ache, so gimme your red card (pregnancy checking card for monthly checking, to make sure u are married, to check if any problem with the baby)...so she said don't have..the doctor said how come don't have..you can't deliver your son here coz no red card..but after explanation by family member the doctor give her special exception..luckily the baby was fine.