The manga is a bit ironic in some way. Japanese scientists seem to be making the biggest strides towards methods of either same-sex reproduction or self-reproduction (as in, grow another you). And they really do need it, along with other eastern countries, because more and more people are choosing not to reproduce (busy with careers, love freedom, women don't want to end up slaves like their mothers, etc).
On the same coin, though, it does put life into perspective. We're always forcing more people into the world to take care of problems they had no hand in making,whether through natural birth or new scientific means. It's pretty sad.