A giant baby weighing 5.9 kg was born to a mother in New York. She was left in shock and amaze when she saw that she had delivered a boy much bigger than she expected. The newborn baby weighed almost twice as much as an average baby. The baby is born to Terrica and Shawn on January 31 in Cayuga Medical Center. His weigh has made him the heaviest baby ever born at the Ithaca-based hospital, reported the NY Post.The mother of four said she knew her son would be a little heavy, however did not know he would be this big. She said he is already wearing three-to-six month old baby clothes and diaper. She feels like she has given birth to a three-month-old. The hospital also posted a photo of the baby on Facebook, comparing him with another newborn baby alongside. The other baby too was born on the same day, whose name is Margot and weighs only 1.8 kg. ]]> Robyn Torgalski, System Director of Maternal and Child Health at Centralus Health, described the two births as a powerful reminder that every newborn and every birth story is unique. She noted that whether a baby weighs four pounds or thirteen, the medical team is fully equipped to deliver the highest level of care to both mother and child. Torgalski added that she is proud of the maternity services at Cayuga Health and feels privileged to support families during such an important life event.Read: 99th Percentile Baby: What It Means, Risks, And What Parents Should KnowGiant Babies: All About ThemAs per the Guinness World Records, the heaviest recorded baby ever was 9.97 kg born in Italy in 1955. Dr Sermed Mezher, a digital health content creator, and a London based GP, shared: "Babies in the womb who measure in the 99th percentile for weight are referred to as macrosomic baby, meaning they are significantly larger than average for their gestational age. While most macrosomic babies are healthy, their larger size can increase the risk of certain complications during pregnancy and delivery."What Does It Mean To Be A 99th Percentile Baby?Babies in the 99th percentile for weight are larger than 99% of babies at the same gestational age. This may lead to birth complications such as shoulder dystocia—when the baby’s shoulders become stuck during delivery—or increase the likelihood of cesarean section. Mothers may also experience a higher risk of perineal tearing, postpartum hemorrhage, and greater pregnancy weight gain. Contributing factors include maternal diabetes, genetics, or excess weight gain during pregnancy.This larger birth size is medically categorized under fetal macrosomia, which refers to babies in the top 10% of weight for gestational age—with the 99th percentile representing the most extreme cases.What Causes A Baby To Be a 99th Percentile Baby?While we do not know the cause in this case, there are certain reason a baby may fall into the category, which includes:You have a large fundal height (a measurement of fetal growth)Significant weight gain during pregnancyGestational diabetes or pre-existing diabetesHistory of delivering large babiesProlonged pregnancy past due dateParental genetics (you were a large baby yourself)