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The question of the great Harvey becomes thus easily answered. "Why is not the fetus in the womb suffocated for want of air, when it remains there even to the tenth month without respiration: yet if it be born in the seventh or eighth month, and has once respired, it becomes immediately suffocated for want of air, if its respiration be obstructed?"
While the terminations of the placental arteries and veins are spread in fine reticulation on the sides of these cells. And thus, as the growing fetus requires greater oxygenation, an apparatus is produced resembling exactly the air-cells of the lungs.
The disease is sometimes congenital, arising from conception during the menstrual period. For the corrupt blood within the maternal body, which forms the nourishment of the fetus, leads likewise to the corruption of the latter. Sometimes the disease is the result of a corrupt diet, or of foul air, or of the breath or aspect of another leper.
This had continued for four pregnancies, but in the fourth abortion took place. Buzzard had a case of nervous tremor in a woman, following a fall at her fourth month of pregnancy, who at term gave birth to a male child that was idiotic. Beatty relates a curious accident to a fetus in utero. The woman was in her first confinement and was delivered of a small but healthy and strong boy.
Among the older writers, Cranz describes an infant which at birth weighed 23 pounds; Fern mentions a fetus of 18 pounds; and Mittehauser speaks of a new-born child weighing 24 pounds. Von Siebold in his "Lucina" has recorded a fetus which weighed 22 1/2 pounds.
The storing up of poisons in the placenta is not so general as the accumulation of them in the liver of the mother. It may be asked if the placenta does not form a barrier to the passage of poisons into the circulation of the fetus; this would seem to be demonstrated by mercury, which was always found in the placenta and never in the fetal organs.
It is virtually impossible during the pregnancy itself for a mother to extract sufficient nutrition from current food to build a totally healthy fetus, no matter how nourishing the food she is eating may be. A mother-to-be also started out at her own birth with a vitally important stock of nutritional reserves, reserves put there during her own fetal development.
Of 6 cases of from four and a half to seven months' duration, 2 lived, and in 1 case at the fifth month there was an intrauterine fetus delivered which lived. Of 11 such cases at nine months, 6 mothers lived and 6 intrauterine fetuses lived. In 6 of these cases no operation was performed. In one case the mother died, but both the uterine and the extrauterine conceptions lived.
A number of articles, invaluable when delivery occurs at full term, are useless if the fetus is immature and cannot live, and therefore it is unnecessary to provide them until two or three months before the confinement is expected. In the event of a miscarriage what is needed can be procured upon very short notice.
There are, however, very weighty reasons for believing that this substance has not the character of food. A more plausible supposition is that the fetus produces this material in the course of its natural living processes, and the substance would accordingly be a waste-product.
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