Many couples, in the midst of their struggle with infertility and who may have undergone several cycles of fertility treatment, have a hard time visualizing success. They often have an even harder time believing they could conceive a multiple gestation. On the other hand, many fertility patients may see a twin gestation as a positive thing in that they can increase their family size all at once – a bargain!

In this country, we have seen an increase in the percentage of twin births that has become phenomenal and is mostly due to an increase in the use of fertility medications and assisted reproductive treatments. Of the 35,025 babies born from IVF in the year 2000, 44% were twins and 9% were triplets or more. Nationwide, the number of twins has increased by 65% since 1980 and by 38% since 1990. These numbers have not gone unnoticed by public health officials, insurance companies and increasingly, lawmakers.

Thankfully, although in the early 1990′s we saw astounding increases in the number of triplet and higher-order multiple gestations, the good news is that these numbers are falling. This change is felt to be due to increased awareness on the part of reproductive specialists and consequently better education of their patients about the desirability of avoiding triplet+ gestations.

Although most twin and even most triplet babies survive without serious problems, these pregnancies do involve significant increases in the risk for poor outcomes. This is because the gestational age at delivery (averaging 40 weeks for a singleton pregnancy) is decreased on average by 3 weeks for each additional fetus. Neonatal Intensive Care Unit admissions are significantly higher as a consequence. Only 9% of singletons end up in the NICU but 48% of twins and 78% of higher order multiples are admitted to the NICU. Intrauterine death (stillbirth) is increased 5-fold in twins. Neonatal death (death within the first month of life) is increased 7-fold for a twin as compared to a singleton. (See Table below.)

Treatment of prematurity has allowed even some of the lowest birth weight babies to survive. But survival may not mean disability-free living. Cerebral palsy is a devastating permanent brain injury that occurs either in the uterus or at the time of birth. For twins, the incidence is 4 times higher than singletons and the incidence is 17 times higher for triplets. Ultimately, the main worry is having a child with a severe handicap. This risk is 1.7 times higher for twins and 2.9 times higher for triplets. While the risks of twin gestation are definitely measurable, most high-risk pregnancy specialists do not advocate selective reduction of twin gestations. Most do advocate selective reduction of triplet+ gestations, however.

The maternal risks increase with multiple gestations and the risks rise with each additional fetus. These risks include high blood pressure, postpartum hemorrhage, excessive nausea, miscarriage, gestational diabetes, preterm labor, Cesarean section and even maternal death. Although obstetrics has come a long, long way in this country in the last 100 years, pregnancy and childbirth still pose medical risks to mothers and these risks are definitely affected by multiple gestation.

The purpose of this article is not to frighten patients considering fertility treatments. It is meant to educate our patients about these risks and to help our patients to understand why Pacific Fertility Center is doing its best to adhere to ASRM guidelines. However, we wish to retain the rights to individualize our treatments and adapt to the specific circumstances for each of our patients. We do not want to see the government interfere with medical decisions that should be made between physicians and their patients. This is why our motto is “Conception Solutions: One Healthy Baby at a Time.”

Carolyn Givens, MD

Tags: Conception Health, Minimizing Multiples, Risks of Advanced Reproductive Technologies, Treatment Options

This entry was posted on Thursday, February 22nd, 2007 at 2:37 pm and is filed under Conception Health. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.