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Child Gender by Rh Factor of Parents

This calculator predicts the possible gender of a child based on the Rh factor (positive or negative) of both parents. Although this method is not scientifically proven, it is based on common folk beliefs that Rh compatibility influences the likelihood of conceiving a boy or a girl. It’s often used for fun or out of curiosity by expectant parents.

Baby Gender Predictor Using Parental Rh Factor

Input Fields
If enabled, the result will update automatically when you change any value.

Traditional Rh-Based Gender Prediction Formula

Formula
$$\text{Gender} = f(\text{Father’s Rh}, \text{Mother’s Rh})$$

There is no biological formula to guarantee gender prediction based on Rh factor. However, folklore suggests:

  • Same Rh factors (both + or both –) may lead to a male.
  • Different Rh factors may lead to a female.

These ideas are not backed by science but are culturally popular in some regions.


The Rh factor is a protein found on red blood cells, labeled as positive (+) or negative (–). This calculator plays into traditional beliefs that Rh compatibility between partners can hint at the gender of their future child. Just choose the Rh factor for both parents to get a predicted gender. Please note: this is a traditional belief-based tool and should not be used for medical purposes.

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