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The question of whether every fetus starts as female is a common topic of interest in developmental biology. This inquiry delves into the early stages of fetal development to understand the initial stages of sexual differentiation.
The research indicates that there is no significant difference in fetal heart rate between male and female fetuses during the first trimester. This finding suggests that fetal heart rate is not a reliable indicator of fetal gender at this early stage. The question of whether every fetus starts as female is not directly addressed by the provided data, but the lack of significant differences in early fetal heart rate between genders does not support the notion that all fetuses start as female.
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