Figure 3.178. Close-up of the face of the same infant showing again the disproportion between the large head and the small face which tapers to a narrow jaw giving rise to a triangular facies. The fronto-occipital circumference is normal and the fontanelles are enlarged. Note the frontal bossing, prominent eyes, long eyelashes, and downturned angles of the mouth (giving a carp-like appearance), micrognathia, and posteriorly rotated ears. A triangular facies is often the result of a disparity between the growth of the cranium, paced by normal brain growth, and the growth of the facial skeleton whose bones may share in an intrinsic growth deficiency.
Figure 3.180. In another infant with the Russell-Silver syndrome, note the pseudohydrocephalus, prominent eyes, triangular facies, and carp-like mouth.
Figure 3.179. In the same infant note the cryptorchidism. Genital hypoplasia and hypogonadism are commonly present in Russell-Silver syndrome.
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The first trimester is very important for the mother and the baby. For most women it is common to find out about their pregnancy after they have missed their menstrual cycle. Since, not all women note their menstrual cycle and dates of intercourse, it may cause slight confusion about the exact date of conception. That is why most women find out that they are pregnant only after one month of pregnancy.