Fetal Position
The positioning of the body of a prenatal fetus, characterized by a curved back, bowed head, and bent limbs.
Fetal Attitude
Describes the relationship of fetus' body parts to one another, typically with the head tucked down to the chest and limbs drawn in.
Fetal Lie
The relation of the fetus to the long axis of the uterus; can be longitudinal, oblique, or transverse.
Normal fetal lie
Longitudinal; normal presentation is vertex, with occiput anterior being the most common.
Locating Fetal Heart Tone (FHT)
Best transmitted through the convex portion of a fetus, typically the fetal back.
Vertex Presentation
Best heard through the top of the uterus.
Breech Presentation
Best heard high in the uterus or at the umbilicus.
Cephalic Presentation
Heard loudest low in the abdomen.
ROA Position
Right occiput anterior position, heard in the right lower quadrant.
LOA Position
Left occiput anterior position, heard in the left lower quadrant.
FHT Normal Rate
The normal fetal heart rate should be 120-160 beats per minute throughout pregnancy.
Ultrasonic Doppler
Technique used to hear fetal heart sounds as early as the 10th to 11th week of pregnancy.
Nonstress Test (NST)
Measures fetal heart rate and response to movement in the third trimester to assess fetal well-being.
Increment Phase of Contraction
When the intensity of a contraction increases.
Acme Phase of Contraction
When the contraction is at its strongest.
Decrement Phase of Contraction
When the intensity of the contraction decreases.
Frequency of Contractions
Time from the beginning of one contraction to the beginning of the next.
Duration of Contractions
Time from the beginning of one contraction to the end of the same contraction.
Interval of Contractions
Period of relaxation; time from end of one contraction to the beginning of the next.
False Labor Contractions
Irregular contractions that do not achieve cervical dilatation.
True Labor Contractions
Regular contractions that increase duration, frequency, and intensity, achieving cervical dilatation.
First Stage of Labor
Onset of true labor pains to full dilatation of the cervix, including latent, active, and transition phases.
Second Stage of Labor
Pushing stage from full dilatation of the cervix to the delivery of the baby.
5 P's of Labor
Passage, Passenger, Position, Psyche, and Power.
Engagement Mechanism of Labor
Occurs when the widest part of the fetal head enters and descends into the pelvic inlet.
Descent Mechanism of Labor
Downward movement of the fetal head through the pelvis.
Flexion Mechanism of Labor
Bending of the fetal head to reduce the diameter that needs to pass through the pelvis.
Internal Rotation Mechanism of Labor
Turning of the fetal head to align with the pelvic outlet.
Extension Mechanism of Labor
Occurs as the fetal head reaches the perineum, pivoting under the pubic bone.
Restitution (External Rotation)
The fetal head rotates back to the original position after being delivered.
Expulsion Mechanism of Labor
Delivery of the rest of the fetal body following the head.
Third Stage of Labor
Begins with birth and ends with delivery of the placenta, including placental separation and expulsion.
Fourth Stage of Labor
Puerperial stage; 4 hours after birth, focusing on postpartum observation for complications.
Assessing Fetal Well-Being
Normal FHT should occur 10-12 times per hour; less than 5 times may indicate distress.
Perineal Care Purpose
To clean vaginal or rectal secretions and prepare a clean environment for birth.
Proper Positioning for Birth
Includes lithotomy, lateral or Sims’ position, and dorsal recumbent position.