The nurse explains to a preconception class that if only a small volume of sperm is discharged into the vagina, an insufficient quantity of enzymes might be released when they encounter the ovum
In that case, pregnancy would probably not result, because of which of the following? 1. Peristalsis of the fallopian tube would decrease, making it difficult for the ovum to enter the uterus.
2. The block to polyspermy (cortical reaction) would not occur.
3. The fertilized ovum would be unable to implant in the uterus.
4. Sperm would be unable to penetrate the zona pellucida of the ovum.
4
Explanation: 4. About a thousand acrosomes must rupture to clear enough hyaluronic acid for even a single sperm to penetrate the ovum's zona pellucida successfully. If only a small amount of sperm were released, there most likely would be an insufficient quantity of acrosomes to penetrate the zona pellucida of the ovum and allow fertilization.
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The nurse manager in a perinatal clinic is reviewing research related to care of patients with cervical insufficiency and preterm birth. What practice change might result from this review of the literature?
A. Administering fewer doses of Rho(D) immune globulin (RhoGAM) B. Decreased utilization of cerclage placement in women with preterm labor C. Measuring serial cervical lengths in all women pregnant with singletons D. Providing betamethasone (Celestone) as long-term therapy
You are counting a patient's respirations. Which is correct?
a. You need to tell the person what you are doing. b. Each rise and fall of the chest is counted as 1 respiration. c. One side of the person's chest should rise and fall at a time. d. Respirations are usually counted for 60 seconds.
A client who has bleeding tendencies has a deficiency in which vitamin?
A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin K
Maternal _____ is associated with increased risk of placenta previa, placental abruption, premature rupture of the membrane, preterm delivery, and restricted fetal growth.
a. anxiety b. obesity c. smoking d. anemia