Immune intolerance in pregnancy. Animation showing the sequence of events when the blood types of a mother and foetus (left) are not compatible. Exchange of nutrients and oxygen between the blood of a pregnant woman and her unborn baby occurs across the placenta. Immune tolerance in pregnancy prevents most types of immune system rejection, but some types still occur. An example is Rh disease. During the first pregnancy, Rhesus D antigens from the blood of an RhD-positive foetus transfers into the maternal blood (upper right). If the mother is not compatible, her immune system will produce antibodies (centre right). These antibodies will, during a second pregnancy (lower right), enter the foetal blood and destroy its red blood cells. This is known as Rh disease or Haemolytic Disease of the Foetal-Newborn (HDFN). For this animation without labels, see K004/3328. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biocosmos / Francis Leroy & Marie Martinache |
Modell-Rechte: | nicht erforderlich |
Länge: | 31 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |