Parturition, Normal Labor and Delivery Flashcards
Phase of parturition - From implantation to few weeks before delivery
Prelude to parturition - phase 1 (Quiesence)
Principal hormone in the quiescence phase of parturition
Progesterone
Phase of parturition - Last 6-8 weeks of pregnancy (or 30-32 weeks AOG)
Preparation for labor/ Phase 2/ Activation
Phase of parturition - Process of Labor
Phase 3/ Stimulation
Hormone that serves as principal mediator in Phase 1 of parturition
Estrogen
At what phase of parturition are Braxton-Hicks felt
Phase 1/ Quiesence
At what phase of parturition is there formation of the lower uterine segment?
Phase 2/ Preparation for Labor/ Activation
At what phase of parturition does lightening happen?
Phase 2/ Activation/ Preparation for labor
At what phase of parturition is there formation is a physiologic uterine ring?
Phase 3/ Process of labor/ Stimulation
What initiates phase 3 of parturition/ stimulation?
Onset of labor/ regular contractions
What initiates phase 4 of parturition/ Involution?
Delivery of conceptus
When does phase 3 of parturition/ process of labor end?
Upon delivery of conceptus
Longitudinal axis of fetus to that of mother
Fetal lie (longitudinal or transverse)
MC fetal lie
Longitudinal
Most important force in fetal expulsion
Maternal intra-abdominal pressure
Portion of fetal body that is within the birth canal or in closest proximity to it
Fetal presentation
Most common fetal presentation
Cephalic (98%)
Breech (2.7%)
Fetal presentation if occipital fontanel is the presenting part?
Vertex
Fetal presentation if anterior fontanel is the presenting part?
Sinciput
Fetal presentation if the bregma is the presenting part?
Sinciput (same with anterior fontanel)
Fetal presentation with neck partially extended
Brow presentation
Sinciput presentation almost always converts to what presentation?
Vertex presentation by neck flexion
Brow presentation almost always concerts to what presentation?
Face presentation by neck extension
Fetal presentation with occipital fontanel as presenting part?
Occiput / Vertex presentation
Which fetal presentations are usually transient?
Sinciput and brow
3 Fetal presentations of breech?
Frank, complete, footling
Characteristic posture of fetus
Fetal attitude
Relationship of the chosen portion of the fetal presenting part to the right or left side of the maternal birth canal
Fetal position
MC fetal position
Left occiput anterior
Possible fetal positions if with vertex presentation
Left occiput anterior
Left occiput transverse
Left occiput posterior
Possible fetal positions if with face presentation
Left mentum anterior
Left mentum transverse
Left mentum posterior
Possible fetal positions if with breech presentation
Left sacrum anterior
Left sacrum transverse
Left sacrum posterior
Presenting part if vertex presentation?
Occiput
Presenting part if face presentation?
Mentum