When people hear about twins, they expect them to be identical. People can’t tell them apart because they all wear the same clothes and have the same hairstyle. However, a very rare phenomenon known as Superfetation occurs in 0.3 percent of women worldwide. It is the occurrence of a second conception during pregnancy, resulting in the development of two embryos of different ages in the uterus.

A mother gave birth to twins who were conceived on two different days in 2018. The younger twin was smaller than the older twin when they were born. Three years later, the older twin was significantly taller than the younger brother.

Gabriella Christmas, 30, of Bedfordshire, England, gave birth to twin boys in July 2018, according to DailyMail UK. The older brother weighed 2 pounds 2 ounces more than the younger, and he was born taller. Gabriella was already confirmed pregnant, but doctors discovered a second baby after three weeks. They informed Gabriella that a second pregnancy is possible but extremely unlikely, with a 0.3 percent chance of occurring. It’s known as superfetation.

Gabriella recalled that when she was pregnant with her eldest son, she went to the doctor for her regular check-up, and an ultrasound was done. She was informed by her physician that an unknown shadow was found beside her baby which made her worry.

She said: “I went for an early scan at about five weeks because I thought I was losing the baby. I had an internal ultrasound because it was so early. They said there was a baby and a shadow which could have possibly been another baby, but they didn’t know for sure because it was a lot smaller. At the 12-week scan, the doctors were worried because one was so much bigger than the other, and they thought that was because the babies were sharing a placenta.”

Gabriella said: “We went to a neonatal expert who said there were two placentas and two completely different pregnancies. The second baby was three weeks behind in his development because he was three weeks younger. So Ezra consistently grew three weeks behind Eduardo during the pregnancies. Even though he was younger, Ezra was the stronger of the two, and he was the one I could feel moving. I just didn’t know it was possible to get pregnant while pregnant, and I think that it’s important for women to know that it is possible for that to happen.”

Despite the fact that the boys were born on the same day, Ezra is three weeks premature. Fortunately, he was born healthy. “They looked different when they were born,” Gabriella explained. “My little one, Ezra, was much smaller, so I had to buy clothes for my twins in different sizes, and his skin hadn’t gone through the waxy-ness process, so he looked like a little old man.” There was also a length difference, which still exists. I consider myself extremely fortunate that they were both healthy because there were fears that Ezra would need to be admitted to the NICU because he was premature and his brother was not, but he was a healthy, early baby.”

In July, the twins will turn four. Despite the fact that they were born on the same day, the two boys have very different personalities. Eduardo is calm and creative, whereas Ezra is a very enthusiastic and lively younger brother.

“They are twins because they were born on the same day and have the same genetic parents, but it was two separate pregnancies that happened at the same time,” explained Gabriella. “It was really hard to get our heads around the fact that I’d fallen pregnant while I was already pregnant.”

Gabriella admits that people do not believe that the boys are twins due to their height differences.

She said: “They still look different now, and people don’t believe they’re twins. They are absolutely twin brothers because they have that bond, but they couldn’t be more different. They’re like chalk and cheese. Eduardo is really calm and creative, and Ezra is boisterous and loves to trash everything.”