Complex sentence: Aarti realises that she is pregnant but due to health problems, the doctor advises her not to travel, so instead her stepmother is asked to go to Palankhet to inform Raja about his baby and to request him to come to Mumbai.
Split into simpler sentences: Aarti realises that she is pregnant but, due to health problems, the doctor advises her not to travel. Instead her stepmother is asked to go to Palankhet to inform Raja about his baby and to request him to come to Mumbai.