As a result of the increased blood flow, your heart has to pump harder and your cardiac volume will increase by as much as 50 percent. If your test shows that you're pregnant, congratulations! This is an exciting and joyous time, but it can be overwhelming as well. Don't be surprised if you are feeling a range of emotions, including apprehension and confusion.
It will help to learn all you can about pregnancy and the steps you need to take care of yourself -- and your unborn child. March of Dimes. Placenta Previa. Howard Hughes Medical Institute. Developmental Biology.
Holy Name Hospital. Health Manual: Pregnancy and Childbirth. The First Trimester Weeks. Colorado State University. Thyroid Hormones: Pregnancy and Fetal Development.
Merck Manual. Normal Pregnancy, Labor and Delivery. Morning Sickness. Nemours Kids Health. Acquire the license to the best health content in the world. October 13, Week 01 to Week 04 of Pregnancy. Getting nourishment Between four to six days after conception, the fertilized egg will develop into a blastocyst and burrow into the uterine lining, attaching itself firmly.
The first weeks During these early weeks, the embryo continues to grow as cells multiply and take on specific functions in a process known as differentiation. As a result, depending on the time of conception, it is possible for women to feel some symptoms of pregnancy this early on. Pregnancy tests are not accurate at 5 DPO, but some women later find that their early symptoms were indeed due to pregnancy. At 5 DPO, if the sperm has reached and fertilized the egg, the cells within the newly formed zygote begin multiplying to create a lump of cells called a blastocyst.
These cells continue to multiply as the blastocyst makes its way down the fallopian tubes and into the uterus. When the blastocyst reaches the uterine wall, it attaches itself to get access to nutrients through the blood. At 5 DPO, the blastocyst may either be traveling to the uterine wall or already connected to it. If it is attached, the blastocyst has started its journey toward becoming a fetus, and pregnancy is underway.
The specific symptoms of pregnancy vary hugely from woman to woman. Women may experience cramps very early on in pregnancy. These are due to implantation, which is when the fertilized egg attaches to the lining of the uterus.
Implantation cramps may occur a few days after ovulation, and many women say that they feel cramps around 5 DPO. These cramps may occur in the lower back, abdomen, or pelvis. Around 25 percent of women may notice slight bleeding around the time of implantation. This is called implantation bleeding, and it tends to be lighter in color and flow than a menstrual bleed. Many women keep track of their basal, or baseline, body temperature while trying to conceive because it changes throughout the menstrual cycle.
The temperature increases after ovulation and may stay higher than usual until the period begins. A basal body temperature that remains unusually high beyond the typical length of time may indicate pregnancy.
However, these signs are not unique to pregnancy and can be due to another hormonal or lifestyle factor. According to the National Institutes of Health , other early signs and symptoms of pregnancy may include:.
Some women also report feeling dizzy or wobbly early on in pregnancy, often when they get up after lying down. This symptom may be due to changes in the blood vessels carrying oxygen to the brain. Some women cannot explain any specific symptoms or changes in their body, but they intuitively feel that something is different.
They might describe it as not feeling like themselves or feeling as though they are suddenly always a step behind. This may be a sign of fatigue and an indication of hormonal changes. As tempting as it can be to take pregnancy tests early and often, it may not be helpful.
The outer part will become the placenta, an outer shell that will provide protection and nourishment to the growing embryo. At this point, the baby is a cluster of cells measuring approximately 0. Around the beginning of week 5 , doctors will likely start referring to the baby as an embryo, and it will be about the size of a sesame seed. You may need to take a break from strenuous exercise during pregnancy, and a doctor can help modify or develop a healthful exercise plan.
During the first 6 weeks of pregnancy, there may be no indications of pregnancy. However, soon after fertilization in some cases, and increasingly as time goes on, you may experience:. A pregnancy test is likely to produce an accurate result if a person takes it 1 week after the first day of the next expected period.
Learn more. Fetal macrosomia is a condition wherein a baby is born at a heavier birth weight than usual. Learn more about fetal macrosomia here.
A study links air pollution to almost 6 million premature births each year. Indoor air pollution is responsible for two-thirds of these perinatal…. Amniotic fluid embolism is a dangerous pregnancy complication that develops due to a severe allergic reaction. Learn more about it, including symptoms,.
Pregnancy dreams can be more realistic, detailed, or frightening than usual. However, they are not usually a cause for concern. Learn more here. Your pregnancy at week 3. Medically reviewed by Debra Sullivan, Ph. Fertilization How does it happen? What are chromosomes? How big is my baby? Things to do Pregnancy begins when a sperm fertilizes an egg.
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