Betty Bienias and husband Pawel 'didn't listen' to advice to not have sex four days before her eggs were retrieved for IVF
A couple who turned to IVF after seven years of trying for a baby have welcomed triplets - two of whom were conceived naturally.
Betty Bienias, 36, and husband Pawel 'didn't listen' to advice to not have sex four days before her eggs were retrieved for the NHS treatment.
The mother, who has been trying for a baby since she married, then became pregnant with Matylda and Borys days before her embryo transfer.
She conceived another baby, Amelia, through IVF several days later.
The pregnancy has been described by one fertility expert as 'almost impossible'.
Doctors said the non-identical twins were conceived naturally just a few days before her IVF embryo transfer on May 2 last year.
The parents were still unaware that Ms Bienias was already pregnant at the time she discovered her IVF treatment had been successful.
The mother, who had been trying for a baby since she married, then became pregnant with Mathylda and Borys days before her embryo transfer
Factory worker Ms Bienias said: 'They tell you at the fertility clinic that you can't have sex for the four days before your egg collection, because the hormones mean more eggs are fertilised than normal.
'But I think we must have done - because on the scan you can see that the twins were conceived some time in the week before the embryo transfer.
'It was the biggest miracle. I never thought something this incredible could happen to me.
The parents were still unaware that Ms Bienias was already pregnant at the time she discovered her IVF treatment had been successful
'I spent many days thinking that maybe I was the person who would never have a baby. I never, ever thought there would be three in there.
'I still can't quite believe it when I look at the three of them. I'm so happy.'
Geeta Nargund, a consultant gynecologist and medical director at Create Fertility, told the Sun couples are advised to remain celibate during egg collection as it can result in multiple births.
Mothers are more at risk of complications, including premature birth, with a multiple pregnancy.
The mother then became pregnant naturally with Mathylda and Borys. She conceived Amelia through IVF treatment days later
Ms Bienias, 36, and her husband Powell (pictured) had been trying for a baby for seven years
Fertility expert Emma Cannon, who has worked in the field for 25 years and founded the Emma Cannon Clinic in Chelsea, London, was stunned to hear of Ms Bienias' triplets.
She said: 'In my 25 years as a fertility specialist, I have only come across one or two scenarios in which women have fallen pregnant whilst undergoing IVF treatment.
'But this has happened before the embryo transfer takes place - and they then choose to proceed with the natural pregnancy, and do not proceed with the IVF cycle.
Doctors said the non-identical twins were conceived naturally just a few days before her IVF embryo transfer on May 2 last year
'I have never encountered anyone who has conceived naturally before, or around the time of, embryo transfer, and then gone on to become pregnant via the IVF cycle as well.
'But I also know that there is much we do not understand and miracles do happen.'
Ms Bienias, a weight loss consultant, suffers from polycystic ovary syndrome - a condition which means her ovaries don't regularly release eggs.
This was brought on by weighing over 17 stone - but she lost five stone in order to conceive.
Ms Bienias (pictured left before and right after she started dieting) suffers from polycystic ovary syndrome - a condition which means her ovaries don't regularly release eggs
The triplets were born five weeks early by caesarean section at the Royal United Hospital in Bath on December 13.
Amelia was born weighing 5lbs 2oz, Matylda weighed 4lb 5oz, and little Borys weighed just 4lbs.
Ms Bienias said all three babies are doing well and are 'growing too fast'.
The mother said: 'I am enjoying everything - even when they wee in bed and I have to clean it up.
'I feed them nearly every three hours, and I go for walks with them every day.
'My husband is absolutely proud of his three babies, and cuddles them every day when he gets home from work.
'I had no idea what to expect from being a mum-of-three all of a sudden. But I'm so happy.'