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The term
'developing ovum is used for the first 7to10 days after conception, i.e., until the implantation occurs.It is
'embryo' from one week to .the .end.. of the second month and later it is called 'fetus'.It becomes
an infant when it is completely born..End of first month
:Length 1 cm; weight 2.5g. The eyes are seen as two dark spots, and the mouth as a cleft.
End of second month
:Length 4cm; weight 10g. The hands and feet are webbed. The placenta begins to form. The anus seen as a dark spot.
End of third month
:Length 9cms.eight 10kgs. The eyes are closed and the pupillary membrane appears. Nails appear and the neck is formed.
End of fourth month
Length 16cm.weight 20gmsSex can be recognised. Languo hair is seen on the body
. Convolutions begin to develop in brain. Meconium is found in the duodenum.End of the Vth Month
:Length 25cm; weight 400gms. Nails are distinct and soft. Light hair appears on head. Skin is covered .with vernix caseosa., Meconium is seen at the beginning of the large intestine.
End of sixth month
:length 30cms.weight 700g. Eyebrows and eyelashes appear. Skin is red and wrinkled and subcutaneous fat begins to be deposited. The testes are seen close to the kidneys.
End of seventh month
:Length 35cms; weight 0.9 to 1.2 kg.. Nails are thick. Eyelids open and pupillary membrane disappears. Skin is dusky red, thick and fibrous. Meconium is found in the entire large .intestine.Testes are found at external inguinal ring. Gall-bladder contains bile and caecum is seen in the right iliac fossa.
End of eighth month
:Length 40cms; weight 1.5 to 2kg. Nails reach. The tips of fingers. Scalp hair is thicker. Skin is not wrinkled. Left testes is present in the scrotum. Placenta weighs 500gms.
End of ninth month
:Length 4508; weight 2.5 to 3 kg. Posterior fontanelle is closed. Scalp.hair is dark and 4 cms long, meconium is seen at the end of large intestine. Scrotum is wrinkled and-contains both testes. Placenta weighs 500 g. Ossification centres are usually present in ihe"lower end of the femur, in the cuboid and capitate-bones.
End of tenth month
: (Full term child) :Length 50 to 53cm;
crown-rump length 30 to 33cm:
weight 2.5 to 5 kg; average about 14 kg.
The length is much less variable than the weight. The male infant weighs about 100 g. more than the female.
The circumference of the head is usually 33cm.
The scalp hair is dark, 3 to 5 cm. long.
The face is not wrinkled.
Lanugo is absent except on the shoulders.
The skin is pale and covered with vernix caseosa.
The nails project beyond the end of fingers
The cartilages, have formed in the nose and ears.
The testes are present in the scrotum
Vulva is closed and labia minora are covered by fully developed labia majora.
The rectum contains dark brownish, green or black meconium.
The placenta is 22 cm. long.
The umbilicus is situated midway between pubis and ensiform cartilage.
The centre of ossification is found in the lower end of femur and sometimes in the cuboid
and in the upper end of the tibia.
Anterior fontanelle is 4x2.5 cm. size.
http://geocities.com/sheetaljain2001/ossificationcentre
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