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First Weeks of Pregnancy

The first few weeks of pregnancy can be somewhat strange and
wonderful at the same time, but its also a very special time,
at this stage most women wouldn’t realize that they are
pregnant. This guide will help you understand and enjoy your
pregnancy, you will learn whats going on in your body and how
your baby is developing week by week.

Fertilization of the Egg

Fertilization is believed to occur in the middle part of the
tube called the ampulla, not inside the uterus. Sperm travel
through the uterine cavity and out into the tube to meet the
egg. When the sperm and egg join, the sperm must pass through
several outer layers of the ovum, although many sperm penetrate
the outer layers usually only one sperm enters the ovum and
fertilizes it. After the sperm penetrates the ovum, the sperm
head attaches to its surface. The membranes of the sperm and
ovum unite, enclosing in the same membrane. The ovum reacts to
this contact with the sperm by making changes in the outer
layers so no further sperm can enter. The sperm also loses its
tail. The head of the sperm is called the male pro nucleus, the
ovum is called the female pro nucleus. The chromosomes of the
male and female pro nuclei combine. When this starts happening
very small bits of information and characteristics from each
partner conjoin. This chromosomal information gives us our
particular characteristics. Each parent supplies 23 chromosomes
your baby is a combination of chromosomal information from both
parents. Your baby’s sex is determined at the time of
fertilization by the type of sperm that fertilizes the egg.

When is your baby due?

The beginning of a pregnancy is actually figured out from the
beginning of the first day of your last menstrual period. That
means your are pregnant 2 weeks before you actually conceive.
This can be confusing so lets look a Little closer.

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For most women they don’t know the exact date of conception,
but they have a good idea of the date of their last period,
this is the point from which a pregnancy is dated, for most
women ovulation takes place around the middle of their monthly
cycle or 2 weeks before their next period. Pregnancy last about
280 days or 40 weeks from the start of the 1st day of the last
period. You can calculate your due date by counting 280 days
from the 1st day of your last period, this gives you the
approximate date of delivery. Calculating a pregnancy this way
gives the gestational age or menstrual age, most doctors and
midwifes use this method to keep track of time during
pregnancy. Most people count time during pregnancy by using
weeks, most find this the easiest way.

Its also important to understand a due date is only an
estimate, not an exact date don’t count on that particular
date, see it as a goal a date to prepare and look forward to,
you may see that date come and go and no baby. Understanding
how time is recorded during pregnancy helps, remember no matter
how you count the time of your pregnancy its going to last as
long as its going to last, but a miracle is happening, a life
is growing and developing inside you, enjoy this wonderful
change in your life.

Look out for future articles from me on week 4 and beyond.

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