1 Month Pregnant: What Are the Symptoms of Pregnancy?

The first month of pregnancy refers to Week 1 to Week 4 of pregnancy, with Day 0 of your pregnancy falling on the first day of your last menstrual period. In this month, the sperm will meet the ovum and become a fertilized egg, which will then travel to the uterus. This is still during the initial stages of pregnancy and so, there might not be any detectable signs. Pregnancy might be uncharted waters for you, so here’s “a bird’s eye view” of the first month and what will happen!

First month of pregnancy

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The first month of pregnancy refers to the four weeks from Week 1 to Week 4. A week is 7 days, and Week 1 Day 0 is the first day which you had your last menstrual period. The science behind pregnancy is simple – when the sperm and the egg are active and can interact with each other, that signals the start of pregnancy. Even though there’s no baby yet in Weeks 1 and 2, pregnancy has officially started!


Week 1

Pregnancy starts from the first day of your last menstrual period. Week 1 of pregnancy is the week in which you have your period. There are no changes in your body yet.


Week 2

In Week 2 of pregnancy, the follicle in the ovary matures and becomes an egg in a process called ovulation. This egg then moves down the Fallopian tube. If you’re hoping to get pregnant, note that you increase your chances of conception when you have sex a few days before and 1 day after ovulation.


Week 3

The sperm and the egg fuse together to form a fertilized egg. When the fertilized egg finally implants itself into the endometrium, pregnancy is established. But in Week 3, pregnancy is not yet established .


Week 4

Implantation refers to the fertilized egg implanting itself into the endometrium, the lining of the uterus. When pregnancy is established, the female hormone called human chorionic hormone (hCG) becomes secreted in the body actively, thus stopping the next menstrual cycle from taking place. The hCG will become secreted in larger and larger amounts and in Week 5 when hCG levels reach a 50 mIU/mL, pregnancy test kits will be able to detect its presence and give a positive result.

1 Month Pregnant: Symptoms

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As there is no baby yet in the belly until Week 4 of pregnancy, the pregnancy test kit is unable to pick up any signs and it is not uncommon to be completely unaware of your own pregnancy. However, from Week 4 of pregnancy onward, some moms will see the early signs and symptoms of pregnancy start appearing.


Signs of pregnancy

  • Mild bleeding before the expected menstrual period
  • Continual feeling of tightness in chest
  • Feeling feverish
  • Drowsiness
  • Taste changes
  • Become more sensitive to smells
  • Basal body temperature continues to increase
  • Constipation or diarrhea

1 month pregnant: Changes in the body and belly

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Once the fertilized egg is implanted, the amounts of hCG, progesterone, and estrogen secreted in the body increase.

The hormone hCG stimulates the corpus luteum, stops menstruation from taking place and prevents the pregnancy from terminating on its own. The endometrium continues to thicken as the weeks of pregnancy go by, and its thickness will reach the peak sometime around Week 11, after which it’ll become a little thinner and maintain that level of thickness throughout the rest of the pregnancy.

Progesterone supports pregnancy by increasing the blood flow in both the uterus and in the area surrounding the uterus. Progesterone causes your body temperature to increase in order to send the necessary nutrients to the endometrium to support pregnancy. Progesterone is produced in the ovaries by the corpus luteum. It helps to prepare the womb and also plays a crucial role in the formation and development of the placenta. Progesterone is continually secreted in high amounts in the body until Month 7 or 8 of pregnancy.

Estrogen is secreted by the ovaries when pregnancy is established and as a result of the increased levels of progesterone, estrogen is increasingly secreted. Estrogen is an important hormone that supports pregnancy by causing the uterus to become bigger, and also causes the development of mammary glands.

1 month pregnant: Embryo (Fetus)

woman pregnancy hands heart

In week 3 of pregnancy, the zygote continues to undergo cell division and will become known as a blastocyst. It reaches the uterus in Week 4 and implants itself in the endometrium. Pregnancy is thus established. After implantation occurs, the villi start to form into the placenta.

The baby at this stage is called an “embryo” and they resemble a seahorse with their long tail and gills. The embryo is now about 0.1 mm and cannot yet be detected by the ultrasound scan. In order for the embryo to continue to grow, the 4 extraembryonic membranes – the chorion, amnion, allantois and the yolk sac – starts to develop.

First month of pregnancy: Things to note

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No tobacco and alcohol! Reduce caffeinated drinks!

Moms who smoke are 2 times more likely to have a preterm birth, showing the negative influence smoking has on the baby. Also, research results have shown that drinking a huge amount of alcohol or caffeine can cause miscarriage or stillbirth. You might have drunk alcohol or coffee in the first month of pregnancy because you didn’t yet know that you were expecting. However, immediately when you do find out, stop drinking alcohol and reduce the amount of caffeinated drinks you drink each day!


Refrain from doing X-rays and taking medication

In the first month of pregnancy, the possibility that taking medication or an X-ray could have negative effects on your baby is relatively low. In Months 2 to 4, the important organs of the baby are forming, and if you take medication during this period of time, it’s highly likely that the medicine will have an effect on your baby. The possibility of medication or X-rays having a negative effect on the fetus exists, so you might want to refrain from doing any unnecessary X-rays or taking medication without consulting your doctor first.


Chemical pregnancy

The fertilized egg implants itself into the endometrium, but if it’s unable to stay attached to the endometrium, pregnancy cannot continue and a chemical pregnancy takes place. A chemical pregnancy is a pregnancy loss due to anomalies in the fetus’ chromosomes. This type of pregnancy loss cannot be prevented by the mother, and because it happens before pregnancy is established, it doesn’t come under the term “miscarriage”.

There aren’t any abdominal cramps, bleeding, need for surgery, or any need to worry about the aftereffects after a chemical pregnancy has taken place. If a pregnancy test kit isn’t used, most moms don’t even know they’ve had a chemical pregnancy until their next period comes. A chemical pregnancy is much more common than you’d think it is. Although the term “a chemical pregnancy” seems euphemistic and is to you a pregnancy loss, try not to be discouraged.

1 Month Pregnant: Not realizing that you’re 1 month pregnant

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In Month 1, the sperm and egg have a fateful encounter in your womb, resulting in the fertilized egg that moves to the uterus and makes its home there. You might have suspected that you’re pregnant, but until you are really sure and can confirm the signs, try not to stress yourself out by overthinking things. The baby is about 0.1 mm in Month 1 and from here onward will grow at a rapid rate. This could be the start of something new – the next 9 months will be a real rollercoaster ride, but even as you have uncertainties about the future, have your chin up, take good care of your body even as you face the future as bravely as you can!