A 1-month-old infant is diagnosed with gastroesophageal reflux. Which intervention should the nurse teach the mother to help with the symptoms of this disorder?

A. Influenza vaccine: The influenza vaccine is safe and recommended during pregnancy, particularly in the second and third trimesters. It helps protect both the mother and the unborn child from the flu, which can cause severe complications in pregnant women.

B. Varivax vaccine: The Varivax vaccine, which protects against chickenpox, is a live attenuated vaccine and should not be given during pregnancy due to potential risks to the fetus. If a woman has not had chickenpox, she should be vaccinated before becoming pregnant.

C. MMR vaccine: The MMR vaccine, which protects against measles, mumps, and rubella, is a live attenuated vaccine and should not be given during pregnancy. It is recommended to wait until after pregnancy to receive this vaccine, as it can pose risks to the developing fetus.

D. Gardasil vaccine: The Gardasil vaccine, which protects against human papillomavirus (HPV), is not recommended during pregnancy. It is advised to delay vaccination until after pregnancy. The potential risks are not well established, so it is typically avoided.

A. Breast tenderness: Breast tenderness is a common early sign of pregnancy due to hormonal changes, particularly increased estrogen and progesterone. It is a presumptive sign because it is not unique to pregnancy and can occur with other conditions as well.

B. Amenorrhea: Amenorrhea, or the absence of menstruation, is one of the most common early signs of pregnancy. It is considered presumptive because it can also be caused by other factors such as stress, illness, or hormonal imbalances.

C. Frequent urination: Frequent urination occurs due to hormonal changes and increased blood volume, which leads to more fluid being processed by the kidneys. It is considered a presumptive sign of pregnancy, though it can also occur with other conditions like urinary tract infections.

D. Positive pregnancy test: A positive pregnancy test detects the hormone human chorionic gonadotropin (hCG), which is a probable sign of pregnancy. It is more definitive than a presumptive sign, but it can sometimes result in false positives due to certain medications or other conditions.

E. Chadwick sign: Chadwick's sign, characterized by the bluish tint of the cervix, vagina, and vulva due to increased blood flow, is a probable sign of pregnancy. It is typically observed by a healthcare provider during a physical examination and suggests pregnancy but is not definitive.

F. Quickening: Quickening is the feeling of fetal movement, which typically occurs between 18 and 20 weeks of pregnancy for first-time mothers. It is a presumptive sign because other conditions, such as gas or muscle spasms, can cause similar sensations.