When a Colorado couple underwent in vitro fertilization late last year in the hopes of conceiving a sister for their preschooler son, they were shocked when the wife became pregnant with twin boys.

Many parents would love to conceive twins. Isn’t it just adorable to have two little people who look exactly the same? There are two types of twins, identical and fraternal twins. Identical twins ...

If you or your partner comes from a family that's brimming with twins, you may be wondering whether that might influence your chance of having twins or multiples. The answer: It does — but only in ...

"Our miracle twins have the same birthday, but one is 18 days older." Seven years earlier, my husband, David, had been diagnosed with testicular cancer. He’d needed chemo and surgery, so doctors had ...