Kate Hill is pregnant with twins.What is the phenomenon here, you ask? The fact that an Australian woman got pregnant in a particularly intricate way - twice in a ten-day period. This phenomenon is called superfetation. It is so rare that Kate's obstetrician, no matter how much he searched the Internet, could not find medical literature on it. There have only been ten precedents so far. As we all know, pregnancy usually stops the monthly ovulation cycle. But in very rare cases, ovulation after conception still occurs. If the second egg is fertilized, then the phenomenon of superfetation is observed. In this case, two fetuses develop in parallel in the uterus, the ages of which differ - only by a few days, but still. The thing is that Kate suffers from polycystic ovary syndrome. And in order for ovulation to occur, she needs to take hormonal drugs. After another dose, Kate ovulated twice. And both eggs were fertilized - at different times. Here is another amazing fact: Kate and her husband Peter had unprotected sex only once during this time. Either the sperm proved to be unusually tenacious, or the contraceptive failed them. After the allotted time, twins were born. Very conditional twins - Kate and Peter's daughters correspond to this definition only in one thing: the same date of birth. Otherwise, Olivia and Charlotte are completely different: height, weight, even blood type. Of course, there is an external resemblance, they have the same parents. But not a mirror image, like many twins. "Hole in one," - the happy dad commented on his double fatherhood. Let us explain: "Hole in one" is a golf term. It means a very difficult trick when a golfer hits the hole on the first shot.