Pregnancy & Baby 
Advertisement

Twins – one bigger than the other

by Dr Howard Lee

question
I am 25 weeks pregnant with identical twins. One baby is one pound two ounces and the other is almost two pounds. The smaller baby has lesser fluid than the bigger one. This really worries me. What can I do?

answer
I do understand your concerns and anxieties; you really do want everything to go satisfactorily, but have this worry at the back of your mind. One possibility is 'Twin Transfusion Syndrome', when blood passes disproportionately from one baby to the other through connecting blood vessels within their shared placenta. Your health advisors will have thoughts about this possible problem and will be more than vigilant in their investigation. Early diagnosis, thanks to the modern advances in ultrasound examinations, gives a much greater chance for early help and effective treatment.

It is very difficult to answer your worries with any degree of certainty - 5-15% of twins that have the combination of an amniotic sac each, but share a single placenta may be affected by Twin Transfusion Syndrome; and although they have a separate blood vessel supply from the placenta - there is some linking of their "separate" blood vessels. The most important thing within these 'possible' complications is to remember that you have two NORMAL babies, and the only affection is what is happening to the placenta. If there are indications from review examinations, then certain treatments are available, such as amniocentesis, drug therapies and, in certain areas, laser surgery to the involved blood vessels.

iVillage TV - Pregnancy experts

View video in larger player
iVillage Recommends Baby clothes