| sREM | stage rapid eye movement |
|---|---|
| SSCF | sleep stage change frequency |
| SSEA | stage-specific embryonic antigen |
| St, st | let it stand [Lat. stet]; let them stand [Lat. stent]; stage [of disease]; status; stere; sterile; s... |
| 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) |