The old Chinese medicine doctor smiled and replied, "In my experience, it should be about 80% to 90%. After three months, we can be 100% sure. The baby is still too young now.","But the next sentence was said with certainty. 'It's twins, it has to be twins, a little brother and a little sister, hehe, it must be twins, I knew it would be like this.'","It's common for children to hide things, it's nothing major, just be extra careful not to let food spoil in hidden places."。