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4 Weeks Pregnant | Pregnancy Week By Week

4 Weeks Pregnant | Pregnancy Week By Week


You’ve missed your period (wahoo!) and you took a pregnancy test that came back positive. You’re pregnant! Congratulations!

You did a little happy dance and gave the air above your head a nice two-handed fist bump when the test showed a positive result (or maybe you didn’t if this was an unexpected pregnancy. Sorry!), and now reality is setting in – you’re pregnant. You may begin to panic a little bit, but that panic feeling is completely normal and will lessen as you get more used to the idea of growing a human being inside of you for the next nine months.

Your next step is to call your doctor to schedule an appointment to confirm the pregnancy with a urine or blood test. Some doctors will get in you in right away to do a pregnancy confirmation while others may wait until you’re somewhere between six and eight weeks pregnant before they’ll see you. This is usually because that’s the timeframe when the baby’s heartbeat can be detected via a transvaginal ultrasound, so they can confirm viability at that point.

At four weeks pregnant, your baby is about the size of a poppy seed. Yes, as small as one of those annoying little seeds that get stuck between your teeth. Think about how tiny that is! Right now, your baby is called a blastocyst, which is a fancy name for a tiny ball of cells, and it’s making itself at home in your uterus. Cue the pregnancy symptoms.  



The most obvious pregnancy symptom at four weeks is a missed period. That is often the first and only symptom a woman has when she gets a positive result on a pregnancy test. However, it’s not unusual to be experiencing other symptoms already, and if you’re not yet, you will be soon! Most women can’t wait to start having symptoms so that the pregnancy becomes real to them. (Throwing up every day… What’s not exciting about that?)

Whether you’re one of the women who can’t wait to start throwing up every day or not, here are some symptoms you could experience at four weeks pregnant.

  • Missed period. As mentioned above, this is usually the first obvious sign that you’re pregnant.
  • Sore boobs. Many women get sore boobs around the time of ovulation, but usually when you’re pregnant, they hurt much Like, you may even scream when you bump one of them with your own arm type of hurt. Tell your partner, hands off until further notice!
  • Cramping. You may notice some mild abdominal cramps very similar to those you get during your period. Don’t panic. Mild cramping at four weeks pregnant is normal. It’s due to the baby implanting in the uterus. However, if you experience severe cramping, you may want to see your doctor to rule out any problems.
  • Bloating. Thanks to the rise in your hormones, you may look and feel a bit bloated. This is a good time to live in leggings or yoga pants.
  • Mood swings. Ah, yes. Good old hormone-induced mood swings that have you crying during laundry detergent commercials and screaming at your significant other for breathing too loud. Gotta love ‘em. You may not even notice how up and down your emotions are, but if you do notice everyone keeping their distance from you, chances are it’s because you’ve turned into the Exorcist on steroids. Give it another eight weeks or so and your mood swings won’t be so scary, so people will come around you again.
  • Fatigue. Four weeks pregnant is around the time you may start to feel completely zapped of energy and want to sleep all the time. Take naps when you can and be sure to eat well and take your prenatal vitamins to try to combat some of that fatigue.
  • Spotting. A little bit of spotting at four weeks is normal. If you experience period-like bleeding (or heavier) that lasts more than a day or two, get in touch with your doctor to make sure everything is okay.
  • Morning sickness. Morning sickness is different for every woman, and different for every pregnancy too. You may experience nothing more than mild nausea. Or you might excessively throw up all day long. It could last just a few weeks or your entire pregnancy. There’s no telling. If it gets too bad, you can talk to your doctor to see if there’s something you can take to help the nausea or vomiting. If you throw up a lot, you could become dehydrated, which is bad for the baby (and for you, too!), so definitely seek medical attention if you suspect you’re dehydrated.



At four weeks pregnant, that baby has a bit of growing to do before you’ll start showing. Generally, first time moms begin showing somewhere around 12 weeks pregnant, although this varies from woman to woman so you could show earlier or later than that.

Make sure you’re eating healthy foods and taking a prenatal vitamin every day that has folic acid in it. Despite what you may hear, you don’t need to double your food intake because you’re “eating for two.” It’s recommended that women gain between 25 and 35 pounds during their pregnancy, so you don’t want to go overboard with eating just because you’re pregnant.



Because four weeks pregnant is still so early, chances are that you won’t have an ultrasound quite yet. The baby (or blastocyst as it’s called right now) is much too small to really be seen clearly on an ultrasound. In another month or so, the baby will be big enough to be seen via a transvaginal ultrasound and you’ll be able to see its heartbeat!



Here is a quick list of things you should be doing at four weeks pregnant.

  1. Take a test! If you haven’t already tested but suspect you may be pregnant, take a test to confirm it!
  2. Schedule an appointment. When that home pregnancy test shows a positive result, schedule an appointment with your doctor to confirm the pregnancy.
  3. Take prenatal vitamins. You can buy prenatal vitamins over the counter, so be sure you stop off at the store and grab a bottle so you can start taking them right away. Be sure they include folic acid, which is very important for the baby’s growth and development.
  4. Stop drinking and smoking. These habits are not only bad for your health, but they can be very harmful to your baby’s health and development, so stopping them as soon as possible will benefit both of you!
  5. Rest! You’re going to feel exhausted during the first month or two of pregnancy, so get as much rest as you can while you can!



5 Weeks Pregnant

5 weeks pregnant

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