In Jainism, there is no prescribed Dev aaradhana (worship of deities) specifically to beget a son. Jain practice does not use gods for fertility rites. The spiritual focus is on the enlightened beings—Tirthankaras, Arihants, and Siddhas—and on personal conduct (dharma), meditation, and right faith.

• Devas (gods) are acknowledged in Jain texts, but they are not creators or controllers of karma for ordinary beings. Worship of Tirthankaras and Arihants is the main devotional path.
• Birth stories of great souls (like Mahavira) often mention auspicious dreams of the mother or divinations in mythic accounts, but these are part of the biographies of great souls and do not translate into a ritual for common families to obtain a child.
• There are no different rites for Digambaras vs. Śvetāmbaras in this context that introduce a fertility-oriented aradhana; both traditions emphasize the same core worship of liberated beings.

If you want to explore how Jain worship centers (aaradhana) differ in focus from birth or fertility rites, you can read about the general practice of venerating Arihants and Tirthankaras on JainKnowledge pages.