You won’t believe it but at 1 week pregnant you have not even formed your embryo yet. Unbelievable isn’t it? But it’s true. The medical experts believe that 1 week pregnant starts 14 days after the date of your last period. So the first week of pregnancy, nobody is sure whether you have conceived a baby or not. Also there are not many changes taking place inside the body. 

One week has passed since the start of your period, and with a menstrual cycle repeated every 28 days, you are about a week before ovulation. The egg (or oocyte) in one of a woman’s ovaries ripens and prepares to be released. There is no doubt that every woman is filled with great happiness when the news of her pregnancy is given to her, but she faces many troubling feelings of fear, joy, anxiety, and perhaps sadness.

week 1 of pregnancy
Egg cell leaves the ovary


The pregnancy stages are considered a great responsibility for every mother, especially in the first week of pregnancy, which often does not know much from the ladies it has already started. Women begin to notice signs of pregnancy through some physical and mood disturbances, and the menstrual cycle may be late, so this is a more significant sign of pregnancy. This pregnancy sign appears, which is either the HCG hormone in the blood or the urine, both of which appear in the First Week of pregnancy. On this date, all preparations for welcoming a new member of the family begin.

Through this article, we will provide a set of tips and facts for this stage.

Your baby is about the size of a poppy seed

1 Week pregnant baby size
1 Week baby size
  • You are in the first trimester.
  • You are in the first month.
  • The remaining number of weeks: 39

Baby development (The Science Behind Getting Pregnant)

The doctor or any specialized health care provider calculates the due date from the first day of the last menstrual period. This means that the count for week 40 begins with a catapult about two weeks before the sperm meets the egg and gradually turns into a fetus.

week one pregnancy journey

If you have had a home pregnancy test, and the result is positive, you are likely to be pregnant in a week’s advance. Whether you are pregnant or not this Week, it is still considered the first week of pregnancy. Knowing that no child is growing yet, the hormones inside your body are preparing for the release of a new egg. The period between 10 to 20 days after the first day of the last menstrual period is the best period for fertilizing an egg.

1 week pregnant journey
sperm floating to ovule.

Pregnancy occurs when one mature egg is fertilized by one mature sperm of the man despite the presence of large numbers of eggs and sperms. Two sperms may fertilize two eggs, and this condition occurs in the birth of the twins. Then the fertilization process begins to form a fertilized egg, and this egg begins to form the fetus is in the first stage of pregnancy, which lasts up to three months called the first trimester.

The first month of pregnancy is the most dangerous stage for the fetus’s health because the fetus at this stage appears in the endometrium in the form of tiny sperm. Perhaps the size of a poppy seed can be estimated, and no growth is made.  Organs or senses for the fetus and the fetus’s weight are tiny, meaning that the fetus is exposed to many problems during this period.

Mother development 

Now, your body is preparing for your uterine lining. As such, you may be experiencing the usual symptoms that accompany the start of your period, including some mood swings and changes due to hormones

If all goes well, fertilization will occur at the end of the second week or the beginning of the third week, depending on when the ovulation phase begins in your body. Ovulation indicates the fertile period that the body is going through. Many physical and psychological changes occur to the mother in the first stage of pregnancy. Some of them can be observed, as they are very similar to the symptoms of approaching the menstrual cycle, such as feeling heavy or swollen the body, enlarging the breasts’ size.

You will also experience a noticeable rise in body temperature, also known as basal body temperature, with slightly enlarged breasts and a feeling of need to urinate more during the day. This condition will continue for several days due to the rise in pregnancy hormones that stimulate the body’s sweat glands.

In some women, not all of them experience continuous bleeding throughout their first week, distinguished from the menstrual cycle. During this period, the mother is in extreme discomfort due to the growing egg settling in the lining of her uterus, and as a result, she gets worse and worse, and her daily activities become even more difficult. She feels the desire to sleep for hours more remarkable than her daily need, and all this happens due to the increase in progesterone hormones.

Fertilization of human egg cell by sperm cell
Fertilization of human egg cell by sperm cell

In some cases, vomiting occurs with severe pain in the front of the head and also in the stomach. During this period, some women may feel a weak appetite and a tendency to eat some types of food and an aversion to other foods, known as the stage of vomiting.

 Unlike the menstrual cycle period, a woman feels an intense desire to eat above average, and many mucous secretions appear in the womb. Psychologically, the mother also suffers from many mood swings from sadness, depression, and tension, depending on the rise in the hormones progesterone and estrogen in the body.

1 Week Pregnant symptoms

Symptoms at this early stage are typically those of your period because you’re not pregnant. This period lasts anywhere from three to seven days.

  • Vaginal bleeding: Your uterus is losing the uterine lining, which was extra thick to cope with a pregnancy.
  • Lower back pain and cramps: Your uterus contracts to release its lining, causing your back and abdomen to hurt.
  • Bloating: Hormone fluctuations can leave you with a bloated belly right before and during your period.
  • Mood swings: Hormone surges can make you irritable and make you emotionally unstable.
  • Headache: Many women get menstrual migraines, which are caused by hormonal fluctuations. Ice packs, OTC (Over-the-counter) pain relievers, and relaxation exercises can help relieve the pain.

1 Week Pregnant Ultrasound

This is not likely, but you might have been prescribed an ultrasound if you have been trying to conceive for some time, check for fibroids, see how many follicles are in your ovaries, and determine the thickness of your uterine lining.  If you have fertility issues, your doctor may prescribe a fertility treatment to help you conceive.

1 Week Pregnant Ultrasound

Tips for you Pregnancy Checklist at 1 Week Pregnant

  • We advise every mother first to take care of doubling the number of calories she gets by at least 30%, with a focus on low-calorie foods that do not lead to weight gains, such as various types of vegetables, fruits, whole grains, proteins, and calcium sources such as cheese and milk. 

We also recommend drinking an adequate amount of water and natural juices containing a moderate percentage of sugars in the first pregnancy period to reduce physical stress and fight constipation at this stage.

  • We recommend reducing the daily strenuous household duties activities or working during this period, especially in the summer

High air temperature can lead to a drop in blood circulation in the body with the need to refrain from carrying heavyweights during this period. 

It is also preferable to stay away from stimulating drinks Like coffee, tea, and succession because it increases alertness and prevents you from getting adequate sleep necessary for the fetus’s development.

  • Ignore the myths circulating about pregnancy that the quality of your food determines the sex of the fetus, or that there are foods that control the color of hair or the body. 

All these rumors have no medical and scientific basis for validity, and the most correct is that these things are due to chromosomes and genetics.

  • It would help if you stopped smoking directly because it harms your health, weakens your immunity, and makes your skin always look dull. 

Also, smoking and alcoholic substances harm the fetus’s immune system and cause the birth of a child who suffers from severe heart and lung problems and inhalation of chemicals such as detergents, pesticides, etc.

  • The mother must do a comprehensive medical examination immediately after making sure of pregnancy to check on her health and make sure that she does not have any diseases that hinder pregnancy continuation.

You must consult the doctor in the case of taking any of the medicines for treating heart disease, diabetes, stress, and other immune diseases because there are medicines that may lead to the miscarriage of the pregnancy or cause severe damage to the fetus. In this case, the doctor can replace it with other medications that contain the same active ingredient.

  • We advise every mother to adhere to these tips to preserve the fetus in the First Week of pregnancy and recommend regular follow-up of pregnancy stages with a specialist doctor.
  • Do not stop exercising as soon as you hear the news of pregnancy, but instead do not engage in violent exercises,  just do morning exercises, as sports work to stimulate blood circulation and withdraw toxins from the body.

1 Week Pregnant Nutrition

The First Week of pregnancy is practical “pre-fertilization”, a period during which the body prepares itself for pregnancy. As every month, during the menstrual cycle, the uterus removes the internal mucosa and produces a mucous membrane that is more vascularized, which can nourish the fetus. 

What you can do at this time is mainly to take care of your health and Nutrition, and prepare the body for the coming days.

  • Make sure to eat balanced meals throughout the day – breakfast, lunch and dinner, and snacks in between. 

It is recommended that daily meals include foods from the five food groups: carbohydrates, vegetables, fruits, proteins and fats. If you are not sure that you have a balanced diet, try to record your meals for a week and compare them with a balanced pregnancy diet. A dietitian may also be consulted.

  • It is crucial to take a folic acid pill, 400 mg, daily. Folic acid is found naturally in green leafy vegetables – such as lettuce, cabbage, spinach, and broccoli, in citrus fruits, lentils, beans, white beans, peas, and whole grains. 

It helps prevent birth defects in the last weeks of pregnancy. It is preferable to combine these foods and take a nutritional supplement.

  • Avoid smoking and alcohol, and limit caffeine consumption to 2 cups of coffee/tea per day.
  • In the first week of pregnancy, many women turn to their family doctor or gynecologist. So if you are on medication, talk to your doctor about continuing to use it.

1 Week Pregnant Exercises

The American College of Obstetricians and Gynecologists states that pregnancy should not be viewed as an excuse not to exercise. They advise pregnant women to get at least 30 minutes of moderate exercise most (if not all) days of the Week. 

All in all, week one is to eat right and prepare your body for various changes you are about to experience.

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