Your Pregnancy: The First Trimester
You’re pregnant – congratulations!
At Plantation General Hospital, we are dedicated to providing the most caring maternity experience possible. Our Maternity Services include special childbirth preparation classes, pediatrician referrals, pre-registration and around the clock Level III Neonatal Intensive Care services.
Good prenatal care is important to a healthy pregnancy and baby. Make sure you visit your doctor (if you need a referral, contact our Consult-A-Nurse® Healthcare Referral service – call toll-free 1-866-442-2362). It also helps to educate yourself about what is happening throughout the stages of your pregnancy.
Let’s take a brief look at what you can expect week by week in the first trimester, one of the most critical times for your baby’s development and the risk of miscarriage.
Weeks 1 and 2
Doctors calculate your due date from the beginning of your last cycle since it’s hard to know exactly when conception occurred. Women who are trying to get pregnant should take 400 micrograms (mcg) of folic acid a day, which has been shown to dramatically reduce the likelihood of spina bifida.
Week 3
Your embryo is there, it’s just the size of a pin head. It’s a group of about 100 cells multiplying and growing rapidly.
Week 4
You’ll likely notice this week that you’ve missed your period – one of the first signs you’re pregnant. You may notice light spotting as the embryo implants itself in your uterus. A water-tight sac called the amniotic sac forms around the embryo. The placenta develops to transfer nutrients between mother and baby. The embryo is smaller than a grain of rice. An initial face takes form. Blood cells are taking shape. Cells are specializing by function:
Outer layer – the nervous system, skin and hair
Middle layer – skeleton, bones, cartilage, muscles, circulatory system, kidneys, and sex organs
Inner layer – breathing and digestive organs
Week 5
Heart, brain, spinal cord, muscle and bones are beginning to develop. You might suspect by now that you’re pregnant. Some early symptoms include: the need to urinate more, nausea, soreness in your breasts, feeling tired. As soon as you suspect you’re pregnant, visit your doctor. Prenatal care ensures a healthy baby.
Week 6
This is an extremely important time in the development of the embryo, when it’s susceptible to factors that can interfere with its normal growth. It’s about the size of a pea. The eyes and limb buds are forming. A heartbeat can sometimes be detected by ultrasound. The beginning of the central nervous system has formed. You notice weight gain; your clothes fit a little tighter. Eat a healthy diet and take prenatal vitamins. If you haven’t already, stop smoking and drinking.
Week 7
The embryo makes great strides in size, growing to half an inch from crown to rump. The heart and lungs are more developed, as are the eyes and intestines. The brain and spinal cord are growing.
Week 8
The embryo is about the size of a grape. Ears and the tip of the nose are visible. The arms have grown longer and bend at the elbows. You may feel some cramping or pain in your lower abdomen or sides. The uterus, now the size of a grapefruit, tightens or contracts throughout pregnancy.
Week 9
The embryo is about an inch from crown to rump. Your baby now moves its body and limbs, and this movement is visible during an ultrasound. You may be experiencing food aversions or cravings, bloating, and mood swings and weepiness.
Week 10
Your baby is now officially a fetus. It’s about an inch and a half from crown to rump. Eyes are covered by skin that will eventually split to form eyelids. You may continue to feel tired and moody. Schedule your chorionic villus sampling (CVS) test now if you plan to have one. It detects genetic defects, including Tay-Sachs, sickle cell anemia, most types of cystic fibrosis and Down syndrome.
Week 11
Your fetus measures about two inches from crown to rump. The heartbeat can be heard through a stethoscope. Fingernails and genitalia are showing, and the baby is swallowing and kicking. You may feel your growing uterus in your lower abdomen and see changes in your hair, skin and nails.
Week 12
By the end of the third month, your baby is fully formed. It has arms, hands, fingers, feet and toes, and it can open and close its fists and mouth. The circulatory and urinary systems are working. The most critical development is finished. Your baby will now grow larger and stronger. The chances of miscarriage have dropped significantly. Your energy improves; nausea goes away. The average weight gain is no more than five pounds.
Sources:
June 7, 2010 | Posted by Plantation General
Categories:
Tags:


2015 75% of adults and nearly 24% of children and adolescents will be overweight or obese. It’s estimated obese Americans spend about 42% more than healthy-weight people on medical care each year.
Before beginning any exercise or diet plan, you should consult a physician. Call our free Consult-A-Nurse hotline at 1-866-442-2362 for a doctor referral.