1 Month Pregnant: 0 to 3 Weeks Pregnancy

At 1 month pregnant, it begins on the first day of your last menstrual cycle and ends at 4 weeks (28 days). At 7-10 days following fertilization, the fertilized egg undergoes cell division as it moves into the uterus for implantation. By 3 weeks, the fetus will be absorbing its mother's nutrients, marking the true beginning of its growth. That’s the initial development within 1 month pregnancy.

Note 1: The fetus, fish-like in appearance.
Note 2: The uterus is about the same size as before pregnancy, close to that of a chicken egg.

Memo for this Month:

Fetus Size: Approx. 1cm

Fetus Weight: Approx. 1g

● Uterus Size: Chicken egg-sized

● Physical fatigue and sleepiness

● Cold symptoms, slight fever

● Choose a hospital

● After testing positive on a pregnancy test, visit the hospital as soon as possible to establish a prenatal care plan

● Expecting mothers belonging to the workforce should work fewer hours and avoid overworking

● Be cautious when taking medicines or getting X-rays

How Developed is the Baby for 1 Month Pregnant Mom?

A Soft Shape, 1cm Long and Weighing 1g

1 month pregnant

The fetus is hardly visible at this time. It is small, soft and still has not taken on any human characteristics. At 1 month pregnant, the fetus has just become implanted in the uterus. Its head and body make up equal halves, and it resembles a fish with four gills and a tail.

Hereditary Traits have been Determined

Despite not bearing any visible human characteristics, the fetus' hereditary traits such as sex, skin color, hair color, eyelids, height, and body type, have all already been determined. This is all due to the hereditary information transmitted through genes. The fetus grows within the gestational sac, which, prior to the fifth week, is invisible to the naked eye.

All of the Structures are in Place for Organ Development

5 days after implanting in the uterus, a central artery will develop on the surface of the fertilized egg, determining the front, back, left and right sides of the body. The implanted fertilized egg divides into three parts, and the first organ to develop within the body is the neural tube. As time goes on, the neural tube further splits into the brain and spinal cord. This is where the central nervous system originates. Next, the heart, blood vessels, and the blood and circulatory systems develop. The other organs and muscles also begin to take shape and begin to grow.

Changes in Mommy's Body at 1 Month Pregnant

Still no Detectable Signs 

The first month of pregnancy refers to the period of time between the first day of your last menstrual cycle and the start of the next cycle. At this time, there are still no signs that a mother could detect on her own. It is only when you miss your period for a week or more, that is, at 5 weeks, that you will be able to positively confirm that you are pregnant.

The Uterus is only the Size of a Chicken Egg

When the fetus has implanted in the endometrium, the uterus is nearly chicken egg-sized, differing very little from the time before pregnancy. However, after the fertilized egg implants in the uterus, the endometrium becomes softer and thicker. 7-10 days after fertilization, the egg implants in the endometrium. When this happens, we can say that the pregnancy has actually begun.

Elevated Temperature

Looking at a basal body thermometer, one's body temperature moves from low to high. This is the time that you are ovulating. If you are not pregnant, this duration of elevated temperatures will last for two weeks until your temperature begins to lower, at which time your monthly period begins. However, if you are pregnant, the elevated temperature will last more than two weeks. Body temperature will be about 0.2˚C higher than normal. This elevated temperature will last until the 15th week of pregnancy.

Physical Fatigue and Cold Symptoms

There is still no way to sense any of the signs of pregnancy at this time. A small number of more sensitive people will feel like they are coming down with a cold, experiencing a slight fever and physical fatigue. They may also feel chilly or even experience unpleasant phenomena such as wanting to vomit, nausea and poor digestion.

Breasts Grow Firm and become Sore

If the fertilized egg has implanted in the endometrium, the ovaries will start to secrete progesterone. Progesterone stimulates mammary gland development, which leads to increased breast size. In addition, the nipples also become unusually sensitive, making even slight contact painful. They also grow darker in color. These changes in the breasts become more readily felt at 2 months. That being said, there are also many who do not feel these symptoms.

The Expecting Mother or Family Members have Pregnancy Dreams

An expecting mother might have dreams about the fetus, or, as sometimes happen, a family member may have these kinds of dreams. Dreams about animals, food, the sun, and the moon - a very diverse range of images which also elicit unusual feelings and leave strong memories - are pregnancy dreams, and the dream interpretation for each differs.

Checkup for 1 Month Pregnant

Urine Test

The majority of hospitals test for pregnancy by taking a urine sample. Just like at-home pregnancy tests, an outcome of more than 90% certainty can be obtained 2 weeks after fertilization.

Life Changes Needing Your Attention this Month

● Owing to an acute feeling of being burdened by pregnancy and birth, changes in mood become more pronounced. Be sure to talk with your husband frequently as you prepare for the pregnancy.

● Try to avoid staying out late and going to dinner parties. Furthermore, an expecting mother's stress level increases when her husband frequents business parties or stays out overnight. He should try to avoid these activities as much as possible.

● In the first 3 weeks of pregnancy, do not bathe in water hotter than 45˚C or enter saunas hotter than 90˚C.

● Plan the pregnancy with your husband.

Prenatal Care this Month

Living Healthy while Pregnant is the start of Antenatal Training

Women who are preparing for pregnancy must abstain from taking medicines and getting X-rays. The fetus is a mere 1cm in size and weighs just 1g, it is tiny and fragile; at 3 weeks, when neuronal division and development begins, the fetus is highly susceptible to outside influences. At this time, when a woman cannot detect any signs herself, she needs to exercise the utmost caution regarding her potential pregnancy. People who are in the habit of smoking or drinking alcohol should stop these activities immediately.

Exams You Get on Your First OB/GYN Visit

Medical Assessment

The first thing carried out on your initial visit is the medical assessment. To understand the expecting mother's overall health, the doctor will ask a few questions: Age of first menstrual cycle, length of marriage, medical status and history up to this point, husband's age and medical status, experience with birth and pregnancy, experience with miscarriage and abortion, start time of last menstrual cycle, the presence or absence of any hereditary diseases on the husband's side of the family, how the expecting mother's previous pregnancy and birth were, and so on.

Pregnancy Test

You can tell if you are pregnant from the outcome of a urine test. This exam lets you know whether or not the fetus has implanted in the endometrium. Additionally, if the pregnancy is confirmed, you should receive an internal checkup or a transvaginal ultrasound.

Blood Test

Taking a sample of the expecting mother's blood can test for anemia as well as for infections such as measles, hepatitis B, syphilis, etc, in order to avoid any pregnancy complications.

Transvaginal Ultrasound

This allows you to determine the gestational sac's location. Also checks the presence of ovarian tumors, uterine tumors, uterine abnormalities, etc.

Cervical Cancer Screening

Prior to the ultrasound, the hospital will take a sample of cervical cells to check the state of the cervix. It is fairly common for cervical cancer to be overlooked. The earlier it is detected, the earlier it can be treated, this is always the best thing to do. This test also checks for sexually transmitted diseases.

The entire above mentioned fetus development, changes with the mother’s body, and the tests that the mother should undergo should be expected if you are 1 month pregnant.

For more info check out the video below.

Sandra Henderson

Editor-in-chief at Babiology and a proud mother of four passionate about sharing pregnancy and baby growth knowledges

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