Pregnancy , Labour Flashcards
(42 cards)
Rupture of membrane before the onset of labor at any stage of gestation is referred to as
premature rupture of the membranes
Active labour is divided into 3 stages which are
stage of cervical effacement and dilatation.
stage of expulsion of the fetus.
stage of separation and expulsion of the placenta.
Third stage of labour
The third stage of labor begins immediately after delivery of the fetus, and ends with the delivery of the placenta and fetal membranes.
1st stage of labour
The first stage of labor begins when uterine contractions of sufficient frequency, intensity, and duration are attained to bring about effacement and progressive dilatation of the cervix. The first stage of labor ends when the cervix is fully dilated, that is, when the cervix is sufficiently dilated (about 10 cm) to allow passage of the fetal head
phases of cervical dilation are ?
latent phase and the active phase
The active phase of cervical dilatation is subdivided into?
acceleration phase, the phase of maximum slope, and the deceleration phase
Phases of parturition
Phase 0,1,2,3
Phase 1
There is uterine awakening
- A striking increase in myometrial oxytocin receptors.
- An increase in gap junctions (number and surface area) between myometrial cells.
- Uterine irritability.
- Responsiveness to uterotonins.
- Transition from a contractile state characterized predominantly by occasional painless contractions to one in which more frequent contractions develop.
- Formation of the lower uterine segment.
- Cervical softening.
Phase 2
Same with active labour
divided into the three stages of labor
The onset of labour is the transition between phase 1 and phase 2
UTERINE PHASE 3 OF PARTURITION.
Phase 3 consists of the events of the puerperium maternal recovery from childbirth, maternal contributions to infant survival, and the restoration of fertility in the parturient
Labour contractions are characterized by
strength, duration, and frequency
At onset of labour , what is the frequency and duration of contraction
every 5 to 10 minutes and last for 20-25 seconds
Labour forces are
Uterine contractions
Bearing down efforts( pushing )
Bearing down effort is
is the periodic contractions of diaphragm, pelvic floor muscles and prelum abdominale which are added to the force of uterine contractions. It’s a voluntary expulsive force
The minimal dilatation during the first stage is
for primiparous women: 1-1,2cm /hour and multiparous 1,2-1,5cm/hour.
In patients with no significant obstetric risk factors, the fetal heart rate should be auscultated by what frequency
at least every 30 minutes in the first stage of labor and after each uterine contraction in the second stage of the labor
Molding is ?
is the alteration of the relationship of the fetal cranial bones to each other as the result of the compressive forces exerted by the bony maternal pelvis.
Duration of 2nd stage labour
from 30 minutes to 2 hours in primigravid women and from 10- 50 minutes in multigravid women. The median duration is 50 minutes in a primipara and slightly under 20 minutes in a multipara
Clinical management of the second stage of labor.
When delivery is imminent, the patient is usually placed in the lithotomy position.

With each contraction, the mother should be encouraged to hold her breath and bear down with expulsive efforts.
As the perineum becomes flattened by the crowning head, an episiotomy may be performed, to prevent perineal lacerations.
PERINEAL PROTECTIVE MANEUVERS
are performed to avoid injury of the fetus and laceration of the perineum
What are the PERINEAL PROTECTIVE MANEUVERS
The first one is prevention of preterm fetal head extension (during pushing efforts the fetal head is flexed).
Second is the delivery of the fetal head by extension of vulvar muscles.
Third one is decreasing of perineal tension by borrowing of the tissues from the upper part of vulva ring to the lower.
Forth is regulations of voluntary maternal effort (pushing)
Fifth is the delivery of shoulders traction are indicated. first dow nward, later upward direction of
The delivery of the placenta the placenta generally occurs within 2 to 10 minutes of the end of the second occurs during the third stage of labor.
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Shreder’s sign
the uterine fundus rises up, the uterus becomes firm and globular.
KredeLasarevich ’s sign
doctor presses with his palm above the patient pubis , Before placental separation umbilical cord comes inside a vagina (sign is negative), after separation comes down (sign is positive).