Another theme could be the relationship growth between Spock and the reader during this special time. The pregnancy can be a catalyst for deeper emotional connection and understanding. For instance, they may have to communicate more openly about their fears, hopes, and expectations for the future, which in turn strengthens their bond.
The protection of the reader and the unborn child is often a theme. Spock, with his strength and logical thinking, will likely take on the role of protector in many stories. Also, the theme of cultural differences between Spock's Vulcan heritage and human ways can play a big part, especially when it comes to pregnancy and child - rearing practices.