Brihajjataka 4.22

4.22

udayati mṛdu bha aṃśe saptamasthe ca mande yadi bhavati niṣekaḥ sūtir abda trayeṇa/
śaśini tu vidhir eṣa dvādaśe abde prakuryān nigaditam iha cintyaṃ sūti kāle api yuktyā//(mālinī)E4

If conception takes place when a mild sign or navāṃśa is rising and Saturn is in the seventh house, birth occurs after three years; / but when the Moon [is in the seventh], this rule produces it in the twelfth year; what is declared here should also be considered logically at the time of delivery.