6 weeks Pregnant (according to LMP)

This week, your baby is about the size of a small lentil bean. Her brain, muscles, and bones are beginning to take shape. Her hands and feet resemble little paddles, with thick webbing still in place between her developing fingers and toes. And her tiny heart has begun beating. Though you probably won't actually feel anything for another ten weeks or so, she's about to make her very first movements. See what your baby looks like now and find out why you're feeling so moody, what to do if you can't stomach your prenatal vitamins, and more.

How your baby's growing: The cells that will make up all of your baby's body parts and systems are dividing furiously as her body begins to take shape. Right now she's about the size of a small lentil bean (4 to 5 millimeters across). If you could see through your uterine wall, you'd find an overlarge head and dark spots where her eyes and nostrils are beginning to take shape. Shallow pits on the sides of her head mark her developing ears, and her arms and legs appear as protruding buds. Her hands and feet look like paddles, with thick webbing between the developing digits, but her fingers and toes will soon become more distinct. Below the opening that will later be your baby's mouth, there are small folds where her neck and lower jaw will eventually develop. (Inside, her tongue and vocal cords are just beginning to form.)Your baby's heart (which is starting to divide into the right and left chambers) is beating about 100 to 130 beats per minute — almost twice as fast as yours — and blood is beginning to circulate through her body. Her intestines are developing and tiny breathing passages are beginning to appear where her lungs will be. She's also starting to build muscle fibers and, halfway through this week, she'll likely start moving her tiny limbs. Unfortunately, you'll probably have to wait until you're several weeks into your second trimester before you get to enjoy feeling your baby's calisthenics.* Note: Experts say every baby develops differently — even in the womb. This developmental information is designed to give you a general idea of how your baby is growing.How your life's changing: If you haven't already, you may soon find yourself riding pregnancy's emotional roller coaster, feeling moody one day and joyful the next. Disturbing as this may be — especially if you pride yourself on being in control — what you're going through is completely normal and will probably continue throughout your pregnancy. Up-and-down emotions are partly caused by fluctuating and (in many cases) very high levels of hormones. But hormones aside, your entire life is about to change — and who wouldn't feel emotional about that?Spotting (finding spots of blood on your underpants or toilet tissue after urinating) or bleeding is common in early pregnancy, but sometimes it can be the first sign of miscarriage. If you have any spotting or bleeding, call your doctor or midwife right away so she can determine whether your spotting indicates a potential problem.Pregnancy tip: Breakfast of champions "My prenatal vitamins made me sick, so my doctor gave me a prescription for fruit-flavored, chewable prenatal vitamins and suggested I take them with meals. They really helped." — Janice