Complex sentence: Later in the year Sanjay decided that he wanted to extend the family and so he started putting pressure on Gita to have another child, but no matter how hard they tried, they couldn't conceive.
Split into simpler sentences: Later in the year Sanjay decided that he wanted to extend the family and so he started putting pressure on Gita to have another child. However no matter how hard they tried they couldn't conceive.