1. Implantation bleeding

From week one to week four , everything is still
happening on a cellular level. The fertilized egg
creates a blastocyst (a fluid-filled group of cells)
that will develop into the baby’s organs and body
parts. About 10 to 14 days (week four) after
conception, the blastocyst will implant in the
endometrium, the lining of the uterus. This can
cause implantation bleeding which may be
mistaken for a light period.

Here are some signs of implantation bleeding:
Color: The color of each episode may be pink,
red, or brown.
Bleeding: Bleeding is usually compared to your
regular menstrual period. Spotting is defined by
blood present only when wiping.
Pain: Pain may be mild, moderate, or severe.
According to a study of 4539 women , 28 percent
of women associated their spotting and light
bleeding with pain.
Episodes: Implantation bleeding is likely to last
less than three days and doesn’t require
treatment.

Avoid smoking, drinking alcohol, or using illicit
drugs, which are associated with heavy bleeding.


2. Missed period

Once implantation is complete, your body will
begin producing human chorionic gonadotropin
(hCG). This hormone helps the body maintain the
pregnancy. It also tells the ovaries to stop
releasing mature eggs each month.
You will likely miss your next period four weeks
after conception. If you have an irregular period,
you’ll want to take a pregnancy test to confirm.
Most home tests can detect hCG as soon as eight
days after a missed period. A pregnancy test will
be able to detect hCG levels in your urine and
show if you are pregnant.


3. Temperature

A higher basal body temperature may also be a
sign of pregnancy. Your body’s core temperature
may also increase more easily during exercise or
in hot weather. During this time, you’ll need to
make sure to drink more water and exercise
cautiously.


4. Fatigue

Fatigue can develop any time during pregnancy.
This symptom is common among the early
symptoms of pregnancy. Your progesterone levels
will soar, which can make you feel sleepy.


5. Heart rate

Around week 8 or 10, your heart may begin
pumping faster and harder. Palpitations and
arrhythmias are common in pregnancy. This is
normally due to hormones. Increased blood flow
due to the fetus happens later in pregnancy.
Ideally, management starts before conception, but
if you have an underlying heart problem, your
doctor can help supervise low dosages of drugs.


6. Breast change

Breast changes can occur between the fourth and
sixth week. You’re likely to develop tender and
swollen breasts due to hormone changes. This is
likely to go away after a few weeks when your
body has adjusted to the hormones.
Nipple and breast changes can also occur around
the eleventh week. Hormones continue to cause
your breasts to grow. The areola — the area
around the nipple — may change to a darker color
and grow larger. If you’ve had bouts with acne
prior to your pregnancy, you may also experience
breakouts again.


7. Mood swings

The estrogen and progesterone levels will be high
during pregnancy. This increase can affect your
mood and make you more emotional or reactive
than usual. Mood swings are common during
pregnancy and may cause feelings of depression ,
irritability, anxiety , and euphoria.


8. Frequent urination

During pregnancy, your body increase the amount
of blood it pumps. This causes the kidney to
process more fluid than usual, which leads to
more fluid in your bladder. Hormones also play a
large role in bladder health. You may find
yourself running to the bathroom more frequently
or accidentally leaking.


9. Bloating

Similar to symptoms of a menstrual period,
bloating may occur during early pregnancy. This
may be due to hormone changes, which can also
slow your digestive system down. You may feel
constipated and blocked as a result. Constipation
can also increase feelings of abdominal bloating.


10. Morning sickness

Nausea and morning sickness usually develops
around the fourth to sixth week . Although it’s
called morning sickness, it can occur any time
during the day or night. It’s unclear exactly what
causes nausea and morning sickness, but
hormones may play a role.
During the first 12 weeks of pregnancy , many
women experience decreased morning sickness,
according to the American Pregnancy Association.


11. High blood pressure

In most cases, high or normal blood pressure will
drop in the early stages of pregnancy. This may
also cause feelings of dizziness, since your blood
vessels are dilated.
High blood pressure as a result of pregnancy is
more difficult to determine. Almost all cases of
hypertension within the first 20 weeks indicate
underlying problems. It may develop during early
pregnancy, but it may also be present beforehand.
Your doctor will take your blood pressure during
your first visit to help establish a baseline for a
normal blood pressure reading.


12. Smell sensitivity

This symptom is mostly self-reported. There is
little scientific evidence about smell sensitivity
during the first trimester. But it may be important,
as smell sensitivity may trigger nausea and
vomiting. It may also cause food aversions.
One review looked at reports from 1922 to 2014
about the relationship between smells and
pregnancy. The researcher found a trend that
pregnant women tended to rate odors as more
intense during their first trimester.


13. Weight gain

Weight gain becomes more common toward the
end of your first trimester. You may find yourself
gaining about one to four pounds in the first few
months. The calorie requirements for early
pregnancy won’t change much from your usual
diet, but they will increase as pregnancy
progresses.
In the later stages, pregnancy weight often
spreads out between the:
• breasts (about 1 to 3 pounds)
• uterus (about 2 pounds)
• placenta (1 and 1/2 pounds)
• amniotic fluid (about 2 pounds)
• increased blood and fluid volume (about 5 to 7
pounds)
• fat (6 to 8 pounds)


14. Heartburn

Hormones can cause the valve between your
stomach and esophagus to relax. This allows
stomach acid to leak, causing heartburn.



Source: HealthLine