I never believed in love at first sight until I met my now-husband. I couldn't recognize him from his identical twin brother over the phone. We ended up having fraternal twins, and I got to experience ...

If you’ve got triplets on the way (or know someone who does), you might be wondering: Will all three look exactly alike, or will each baby be different? The answer is a little complicated. Unlike with ...

For 35 years, I was certain my twin sister and I were fraternal. My sister signed us up for a twin study, where we collected our DNA with a swab. We found out we were actually identical twins. When ...

Identical and fraternal twins can provide insight into the effects of nature and nurture on factors such as eye color, intelligence, and autism. The environment can sometimes "override" genetic ...