Discuss with ur husband politely and don't blame him for anything. ur sex desires are natural but try to sought out that why ur husband donot take much interest in sexual relationship. Ask him about his work, family, any tension, any financial or personal issue, in a polite and gentle manner. donot talk in investigative tone. dig out the problem and try to solve it or atleast make ur husband feel that u are always there for him and u do understand his problems. build a relationship of trust with ur husband. then gradually talk about sex and about ur expectations and needs. tell him that u love him alot and want to build a strong bond with him forever.
when ur husband feels comfortable in the discussion, then ask for baby, but donot argue. let him realize ur desire.