Many couples express interest in becoming parents through in vitro fertilization (IVF). An appealing result of IVF is the potential to have twins. Intended parents often ask about having twins through IVF, the frequency of twins with IVF, the risks associated with IVF twins and the positive aspects of having twins with IVF.

While some families may be enthusiastic about the prospects of multiple births, there are important medical aspects for consideration. IVF does present both the risk and the positive aspect of twins. Parents should be aware of multiple births and be fully informed in their decisions about achieving parenthood.

We will cover everything you need to know about IVF multiple births, the increased rates for twins, the decreased rates for twins, and current recommendations from medical professionals.

IVF Twins

Twins may occur in an IVF cycle when both developed embryos are successfully implanted in the uterus. There are several possible scenarios:

Fraternal twins: Two embryos that originated from different eggs successfully implant.

Identical twins:An embryo splits and implants as two separate entities.

Due to practices, IVF results in a higher prevalence of multiple births.

 Are Twins More Common With IVF?

Compared with natural conception, IVF unquestionably results in multiple births more frequently.

When women conceive twins naturally, the frequency is usually around 1-2%. With IVF, this rate can increase with certain factors, such as:

• the age of the mother
• embryo quality
• fertility medications
• success of previous IVF
• number of embryos transferred

Because of the complications associated with multiple pregnancies, many fertility clinics will promote a single embryo transfer (SET).

Possibility of Multiple Pregnancies via IVF

How many embryos are transferred strongly indicates the possibility of IVF multiples.

Single Embryyo Transfer (SET)

When one embryo is transferred in a SET, it is possible but rare to develop identical twins from the split embryo.

Average Twin Rate:

– 1-2%

Double Embryo Transfer (DET)

In DET, two embryos are transferred from IVF, increasing the possibility of twins.

Average Twin Rate

– 20-40%

Despite the possibility of transferring DET, health risks with twin pregnancies drives fertility specialists to prefer SET with their patients.

Health Risks with IVF Twin Pregnancies

Fertility specialists advocate for IVF with SET and their reasoning often lies with the health risks associated with it.

Health Risks to the Mother

Multiple pregnancies via IVF can increase health complications, such as:

• High blood pressure
• Gestational diabetes
• preeclampsia
• complications during a delivery that necessitate a caesarean

Health Risks to the Babies

IVF twins can expereience the health complications of:

• premature birth
•  low weight
•  NICU admissions
•  complications that lead to issues with development

Given the health risks of IVF twins, fertility specialists will advocate for SET.

 Can IVF Result in Identical Twins?

Yes, IVF can also result in identical twins even when only one embryo is transferred as a result of:

• An embryo splitting post-implantation
• A single fertilized egg developing two fetuses

Identical twinning can also occur in natural conception, but appears to be more common in IVF.

 What You Should Know About Carrying Multiples after IVF

Here are 3 Ways to Support a Healthy Pregnancy With IVF Twins

• Go to the Doctor Regularly

More visits to the doctor means more opportunities for complications to be addressed quickly.

• Eat Well

Having twins means more nutritional needs and more calories.

• Drink Plenty of Water

Water is crucial to carrying healthy twins.

Follow Medical Advice Carefully

Activity changes may be suggested by your fertility specialist and obstetrician.

Monitor Mental Health

High-risk pregnancies require emotional support.

Conclusion

Compared to natural conception, IVF increases the chances of twins. Due to the high medical risk of twins, especially IVF conceived twins, the preference in assisted reproduction clinics focuses on singleton births.Achieving positive health outcomes is the primary focus of fertility clinics. Each case is supported by health assessment and reproductive goals of the individual.

If you are looking to do an IVF cycle and want to know your probability of having twins, a discussion with a consultation fertility specialist can safely guide you and help you with the best choice for your family.

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