श्रवणं कीर्तनं विष्णोः स्मरणं पादसेवनं
Listening to stories of lord, singing of glories , rememberance of him,
service of lord his creation
अर्चनम् वन्दनम् दास्यं सख्यम् आत्म निवेदनम्
Worship, service, deference, friendship, self effort for knowledge of Self
These are nine ways of भक्ति
Pregnant woman, if possible should read listen to श्रीमद् भागवतम् stories says Swami Tejomayananda.