Placenta
Stage | Phase | Events | Primipara | Multipara |
---|---|---|---|---|
1 | Latent | Effacement Dilation: 0 → 6 cm Engagement Descent: high → 0 | < 20 hours | < 14 hours |
Active | Dilation: 6 → 10 cm Descent: 0 → +2 | > 0.7 cm/h | > 1 cm/h | |
2 | - | Expulsion :: fetus | < 2 hours < 3 hours if epidural | < 1 hours < 2 hours if epidural |
3 | - | Expulsion :: umbilical cord & placenta | < 30 minutes | < 30 minutes |
Stage | Phase | Events | Primipara | Multipara |
---|---|---|---|---|
1 | Latent | Effacement Dilation: 0 → 6 cm Engagement Descent: high → 0 | < 20 hours | < 14 hours |
Active | Dilation: 6 → 10 cm Descent: 0 → +2 | > 0.7 cm/h | > 1 cm/h | |
2 | - | Expulsion :: fetus | < 2 hours < 3 hours if epidural | < 1 hours < 2 hours if epidural |
3 | - | Expulsion :: umbilical cord & placenta | < 30 minutes | < 30 minutes |
Class | Shape | Ischial Spines | Favorable Positions |
---|---|---|---|
Gynecoid | Round | Non-prominent | All |
Android | Heart | Prominent | None |
Anthropoid | Vertical ellipse | Prominent | OA & OP |
Platypelloid | Horizontal ellipse | Non-prominent | Tranverse |