Download The ovaries produce the ovum (this process is called the ovulatory

The ovaries produce the ovum (this process is called the
ovulatory phase) and release it into the uterine tubes. During the
time the ovum is in the uterine tube where it meets the sperm
(which is called fertilization) the follicle that produced the egg
becomes a very important gland called the corpus luteum. This
gland produces a substance called progesterone, which prepares
the uterus with the rich lining needed for implantation of the ovum
(this process is called luteal phase). An early stage in postfertilization development when cells have rapidly mitotically
divided to produce a solid mass of cells (12-15 cells) (this process
is called Morula). A thin-walled hollow structure in early
embryonic development that contains a cluster of cells called the
inner cell mass from which the embryo arises. The outer layer of
cells gives rise to the placenta and other supporting tissues
needed for fetal development within the uterus while the inner cell
mass cells gives rise to the tissues of the body (this process is
called blastocyst). The conceptus adheres to the wall of the
uterus. At this stage of prenatal development, the conceptus is a
blastocyst (this process is called implantation).
The germ layers are the ectoderm. The ectoderm is first of the
three germ layers in the early stage of the embryo. The ectoderm
is the most distil of the three layers. The ectoderm is a very
important layer because it forms the nervous system, but it also
forms the lining of the mouth, anus, nostrils, sweat glands, hair
and nails. The mesoderm. The mesoderm is the second of the
three germ layers in the early stage of an embryo. The mesoderm
forms mesenchyme which forms muscles in a process known as
myogenesis. The Endoderm is the third and last layer in the three
germ layers in the early stage of the embryo. The endoderm the
endoderm consists of at first of flattened cells, which
subsequently become columnar. It forms the epithelial lining of
multiple systems.
The 4 important tissues are the yolk sack (which supplies
nutrients), the amnion (a fluid filled sack or a shock absorber), the
allantois (which removes waste) and the chorion (which anchors
the embryo to the uterus)
Gestation is the carrying of a fetus or embryo.
Trimester 1 – 1-12 weeks, at the end of the first trimester all major
organs have formed
Trimester 2 – 12-24 weeks, at the end of the second trimester
most organs have formed but are not yet working
Trimester 3 – 24-38 weeks, at 32 weeks the fetus opens its eyes
for the first time
My notes from power point and wikopedia