A nurse is calculating a client's expected date of birth using Nägele's rule. The client tells the nurse that her last menstrual cycle started on November 27th. Which of the following dates is the client's expected date of birth?

A. Shoulder presentation is not typically described using the terms RSA. Shoulder presentation would be noted differently, and it is uncommon.

B. Breech presentation involves the presentation of the fetus with the buttocks or feet first. RSA indicates the specific position of the sacrum in relation to the mother's right side.

C. Vertex presentation refers to the head-first position, and it is not described using the terms RSA.

D. Mentum presentation is not a standard term used to describe fetal presentation. Mentum typically refers to the chin, and fetal presentations are commonly described in terms of the presenting part (e.g., vertex, breech).

The correct answer is B. Explain to the client this is an expected occurrence.

A. Tell the client to follow up with a dermatologist: While it's always good to encourage clients to seek professional advice if they have concerns, in the context of melasma during pregnancy, it is generally a normal physiological change. A dermatologist may not be needed specifically for this condition unless there are other unusual symptoms.

B. Explain to the client this is an expected occurrence: This is the correct action. It's important for the nurse to reassure the client that blotchy hyperpigmentation on the forehead is a common and expected change during pregnancy. Providing education and support can help alleviate the client's concerns.

C. Instruct the client to increase her intake of vitamin D: Blotchy hyperpigmentation is not typically addressed by increasing vitamin D intake. While adequate nutrition is important during pregnancy, this specific concern is related more to hormonal changes than nutritional deficiencies.

D. Inform the client she might have an allergy to her skin care products: Melasma is primarily related to hormonal changes in pregnancy rather than an allergic reaction to skin care products. While assessing for allergies is essential in certain situations, it may not be the primary concern in this case.