A survey of mothers-to-be suggests that eight out of ten women take some form of therapeutic drugs during pregnancy.
The advice from the British National Formulary (British Medical Association and the Royal Pharmaceutical Society of Great Britain) is that all drugs should be avoided if possible during the first three months – and only prescribed at all if the benefits to the mother outweigh the risk to the foetus.
But the latest study from the Children of the 90s project, based at the University of Bristol, showed that only 17 per cent of mothers did not take any conventional medicine throughout the entire pregnancy. And many of those women took iron, folate, or other supplements or herbal and homeopathic products.
Researchers asked 14 thousand pregnant women to report all the medical products they’d taken, including prescriptions, medicines bought over the counter, herbal and homeopathic products as well as iron, vitamins and other supplements.
Dr Judith Headley says it is well established that the baby in the womb may be influenced by medicines taken by the mother – and their use is widespread in various countries.
“Fortunately relatively few drugs have been proven to cause malformations of the embryo or foetus. However little is known about more subtle effects on foetal or child development.”
A previous study from Children of the 90s has shown a possible link between high usage of paracetamol during pregnancy and wheezing in early childhood – suggesting a connection to asthma.
The latest study found that 39 per cent of women took analgesics – mostly paracetamol but also aspirin - during the early stages of pregnancy. Iron preparations were used by 33 per cent, and 22 per cent took folic acid supplements, 23 per cent used antacids, indigestion medicines, in mid to late pregnancy.
Dr Headley says it is not surprising since many pregnant women will suffer from a variety of symptoms such as indigestion, nausea, vomiting, and haemorrhoids.
She notes: “Some conditions are treated with prescription drugs after assessment of risks and benefits with a doctor. However minor ailments are often self-medicated, with over-the-counter products.