sammygirly: I have a girlfriend at work who has been trying to have a baby for a year. She did a long session of fertility drugs and finally caught pregnant! But, at 10 weeks pregnant, her belly was swollen enough that she was showing like a woman 5-6 months along! I was CERTAIN that she was carrying multiples - but yesterday was the ultrasound, and wouldn't you know - they only found ONE baby. HOW CAN THAT BE?? I've decided the ultrasound MUST be wrong. She is way too big for only one baby!! What's your opinion on the reliability of ultrasounds?