| exoerythrocytic stage | Developmental stage of the malaria parasite (Plasmodium) in liver parenchyma cells of the vertebrate host before erythrocytes are invaded. The initial generation produces cryptozoites, the next generation metacryptozoites; reinfection of liver cells from blood cells apparently does not occur. Delayed development of the sporozoite (hypnozoite) of Plasmodium vivax and P. Ovale appears to be responsible for malarial relapse that may occur with these disease agents. (05 Mar 2000) |
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| expulsion, stage of | The part of labour from the full dilatation of the cervix until the baby is completely out of the birth canal. The second stage of labour. (12 Dec 1998) |
| first stage of labour | The part of labour when the cervix dilates fully (to 10 centimeters). The first stage of labour is also called the stage of dilatation. (12 Dec 1998) |
| latent stage | incubation period |
| fourth stage of labour | The hour or two after delivery when the tone of the uterus is established and the uterus contracts down again. (12 Dec 1998) |