International health insurance customers who are concerned about their weight might want to discuss the matter with their doctors.
According to Vicky Warr, a specialist pregnancy fitness consultant for Mothercare and the BBC, exercise is can be very beneficial for women who are carrying a child.
However, she urged pregnant women to "always have their doctor's consent to start weight training or any exercise programme".
Ms Warr explained that pregnancy will help the mother and the baby keep fit.
It will allow women to control their weight gain, reduce their risk of gestational diabetes and will get them ready for "the endurance of labour, which you need to be fit for".
Earlier this month, researchers at the University of Newcastle found that women who are obese during early pregnancy are at a significantly higher risk of their baby dying before, during or up to one year after birth.