Final answer:
The nurse would identify the history of multiple miscarriages as the greatest risk factor for complications in the client's current pregnancy, especially given the client's age of 44 years.
Step-by-step explanation:
The nurse would recognize the client's history of three prior miscarriages as the greatest risk factor for the current pregnancy. The client is in the second trimester, which typically ranges from weeks 13 to 28. Although some symptoms like nausea and vomiting may subside during this period, the history of repeated miscarriages suggests a higher risk of complications. Additionally, the client's age of 44 years further increases the risk for complications such as chromosomal abnormalities, gestational diabetes, high blood pressure, and preeclampsia. A thorough assessment and monitoring plan by the healthcare provider are essential to manage these risks.