Talk:BGDA Practical 12 - Birth: Difference between revisions
From Embryology
m (→Labour Stages) |
m (→Labour Stages) |
||
Line 42: | Line 42: | ||
| following child delivery contractions continue to expel placenta. haematoma separates placenta from uterine wall, separation occurs at spongy layer of decidua basalis | | following child delivery contractions continue to expel placenta. haematoma separates placenta from uterine wall, separation occurs at spongy layer of decidua basalis | ||
|- bgcolor="F5FAFF" | |- bgcolor="F5FAFF" | ||
| valign=top Stage 4 | | valign=top|Stage 4 | ||
| recovery | | recovery | ||
| 2+ hours | | 2+ hours |
Revision as of 12:57, 2 June 2013
Practical Audio
BGD Cycle A 2010 Audio - Dr Mark Hill Monday 17th May 2010 3-5pm G2G4.
listen Part 6 | download (2.13 Mb MP3 18:36) |
Hormones | Roles |
---|---|
Progesterone |
|
Estrogens |
|
Oxytocin |
|
Prostaglandins |
|
Endocrine | Birth |
Labour Stages
Labour Stages | Changes | Time | Roles |
---|---|---|---|
Stage 1 | dilatation | 7 -12 hours (longer for first child) | uterine contractions 10 minutes apart, function to dilate cervix fetal membranes rupture releasing amnion |
Stage 2 | expulsion | 20 - 50 minutes | uterine contractions push fetus through cervix and vagina, contractions 2-3 minutes apart |
Stage 3 | placental | 15 minutes | following child delivery contractions continue to expel placenta. haematoma separates placenta from uterine wall, separation occurs at spongy layer of decidua basalis |
Stage 4 | recovery | 2+ hours | continued myometrial contraction closes spiral arteries |
Hormones | Roles |
---|---|
Progesterone |
|
Estrogens |
|
Oxytocin |
|
Prostaglandins |
|
Endocrine Development |
External Environment
- mainly shown in other species parturition occurs in peaceful undisturbed surroundings, stress may have an inhibitory effect on oxytocin release
- Most human births occur at night (peak at 3am) diurnal rhythm influence