What is the normal expected weight gain of the fetus during the fourth month of gestation?

The expected weight gain of the fetus during the fourth month of gestation is most accurately described by the option indicating that the weight doubles. By the end of the fourth month, the fetus undergoes considerable growth, but it typically does not quadruple its weight. Instead, from months one to four, the fetal weight generally increases significantly, with weight doubling as the fetus develops its essential organs and structures.

Fetal development is characterized by rapid growth, particularly in the second trimester, and while the fourth month marks a critical time in growth, the doubling of weight reflects the more realistic biological changes during this period. By contrast, options suggesting quadrupling or a weight increase by a specific percentage may misrepresent the typical physiological changes observed. In summary, recognizing that weight gain is substantial but not excessively so captures the expected development trajectory during this stage of pregnancy.