I am married for 1 yrs 2 months.our gynecologist had adviced Novelon tablet.21 tablets then 4 days stop then again continue.my wife took it for 7 months, without any problem.her periods were normal.the only wrong thing she was doing is taking the tablet without that 4 days gap.means for 7 months she took the tablet regularly.her period was still normal.there was even no side effect.after 7 months she became pregnant.currently she is 7months pregnant.we had consulted 3 doctors and everyone said she must have missed 1 or 2 tablets.the real fact is she didnt missed. my question is how much these tablets are reliable?we dont want a second baby.