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Gestational age: 12 weeks and 0 days until 15 weeks and 6 days old. Embryonic age: 10 weeks and 0 days until 13 weeks and 6 days old. The fetus reaches a length of about 15 cm (6 in). A fine hair called lanugo develops on the head. Fetal skin is almost transparent. More muscle tissue and bones have developed, and the bones become harder.
The sex of the fetus may be discerned by ultrasound as early as 11 weeks' gestation. The accuracy is relatively imprecise when attempted early. [15] [16] [17] After 13 weeks' gestation, a high accuracy of between 99% and 100% is possible if the fetus does not display intersex external characteristics. [18]
Abdominal ultrasonography of monoamniotic twins at a gestational age of 15 weeks. There is no sign of any membrane between the fetuses. A coronal plane is shown of the twin at left, and a sagittal plane of parts of the upper thorax and head is shown of the twin at right.
The first ten weeks of gestational age is the period of embryogenesis and together with the first three weeks of prenatal development make up the first trimester of pregnancy. From the 10th week of gestation (8th week of development), the developing embryo is called a fetus.
Pregnancy is a special time for many women. It's filled with magical moments. Creating new life. Watching your body grow. Hearing a heartbeat. Seeing the first scan. Preparing to welcome a baby.
Babies born between 39 and 41 weeks' gestation have better outcomes than babies born either before or after this range. [62] This special time period is called "full term". [ 62 ] Whenever possible, waiting for labor to begin on its own in this time period is best for the health of the mother and baby. [ 17 ]
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus.
Bare bump! Pregnant Lala Kent shared stunning maternity shoot photos with her Instagram followers on Wednesday, March 3. Mena Suvari and More Celebs Posing Nude While Pregnant Read article “Mom ...
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