Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 5

Sanskrit:

तस्या उत्पतन्त्या अन्तर्वत्‍न्या उरुभयावगलितो योनिनिर्गतो गर्भ: स्रोतसि निपपात ॥ ५ ॥

ITRANS:

tasyā utpatantyā antarvatnyā uru-bhayāvagalito yoni-nirgato garbhaḥ srotasi nipapāta.

Translation:

The doe was pregnant, and when it jumped out of fear, the baby deer fell from its womb into the flowing waters of the river.

Purport:

There is every chance of a woman’s having a miscarriage if she experiences some ecstatic emotion or is frightened. Pregnant women should therefore be spared all these external influences.