The surface of the fœtus will moreover present an appearance, arising from its great vascularity, which is very characteristic of its immaturity; the red hue, however, to which we more particularly allude, is not acquired until the vessels have attained a certain capacity, and the circulation a considerable degree of vigour; and it is worthy of remark that the appearance becomes again obscure, as the developement of the fœtus advances, from the increasing opacity of the integuments, but in those parts where the deposition of fat in the cellular membrane is wanting, the redness will remain conspicuous, as in the palms of the hands, or in the soles of the feet. The head still maintains an unjust proportion to the rest of the body; the bones of which it consists are extremely soft and yielding; and, on account of the extent of the fontanelles, the connection between them is extremely imperfect. The eye-lids are closed; the hair on the eye-brows and the eye-lashes but thinly scattered; the pupil is generally closed by a membrane; the nails are wanting, or scarcely apparent. The sexual organs will also afford some characteristic appearances. In the male, the testes, between the sixth and eighth month are in progress towards the scrotum; at the end of the seventh they are not yet found there. The scrotum is generally of a bright red colour. In females the vulva is projecting, and the labia separated by the protuberance of the clitoris. The general external appearance of a fœtus may, moreover, indicate the important fact of its having been retained in the uterus after its death. _Lecieux_ observes that the ordinary term which it remains in the womb, in this state, is from five to twenty days; and that, according to the length of this period, the body will have lost more or less of its consistence and firmness; the limbs become lax, and the muscles are readily torn; the epidermis may be removed by the slightest friction; the skin also assumes a purplish, or brownish-red colour; there is often some bloody serum effused in the cellular tissue, just beneath the skin, especially about the cranium;[71] the umbilical cord is large in circumference, soft, infiltrated with serum, livid, and is very readily torn; the thorax is flattened, the head falls into different shapes, and becomes flattened from its own weight; the membranes which serve as a bond of union to the several bones of the cranium, are much relaxed. The brain is in a nearly fluid state, and emits a fetid odour.