The science behind 'multiples'

Seeing is believing. At Springville Elementary School you will see 20 sets of twins (six are identical) and two sets of triplets!

The odds of having identical twins are one in every 250 births world-wide. However, doctors will say, some women have a higher chance of having "multiples" than others.

Dr. Robert DeSantis OB/GYN at Trinity Medical Center says many factors play into the miracle of multiples.

"You have to take in, ethnic background, you have to take in their age, their parity, some different issues that play into the risk of having 'multiples'," says DeSantis.

DeSantis says multiple gestations come through natural conception or through assisted reproductive technology, otherwise known as in vitro fertilization.{} "The rate of multiple gestation from assisted reproductive technology is going to be around 25-30 percent," says DeSantis.

Women over 35-years-old and who take fertility drugs are also more likely to have multiple gestations. Dr. Desantis says with that comes added risks."Pre-term delivery, pre-term labor, hospitalization, problems with blood pressure, problems with diabetes, all of these are going to be increased risks with multiple gestations," explains DeSantis.

Amy Crotts is a teacher and mother of triplets at Springville Elementary.

Crotts says once it became clear she was having multiples, she had to take extra steps to ensure the well being of her babies."Our main concern was health, if they're going to be a healthy. Because when you do have multiples, you're more prone to have problems," Crotts says. "I took more trips to the doctor, more ultrasounds. I worked all the way up until June and then went on moderate bed rest until they were born in September."For Crotts, her family history increased her chance of having multiples.

She says each day, she's thankful for all of her children.Crotts says, "It's great, it's a blessing to have so many."