Gabbhinīvagga

Vinayapiṭaka · Parivāra · Vol. 8 · Section 735

[735] One ordaining (vuṭṭhāpentī) a pregnant woman incurs two offenses (āpatti): in the act of ordaining, an offense of wrong conduct (dukkaṭa); when she has been ordained, an offense entailing expiation (pācittiya).

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 3 other places

Vol. 8 · Section 756 — Kumārībhūtavagga
Vol. 8 · Section 755 — Kumārībhūtavagga
Vol. 8 · Section 757 — Kumārībhūtavagga