Astanga Hrudaya
पुष्टोऽन्यथा वर्षगणैः कृच्छ्राज्जायेत, नैव वा। उदावर्तं तु गर्भीण्याः स्नेहैराशुतरां जयेत्॥२१॥
Otherwise by the mother's food descends (into the genital tract) with difficulty in about a year or not at all. Udavarta & its management: Udavarta of the pregnant woman should be won over very quick by the use of appropriate fats and enemas,
english translation