OJAS

And not just this disclaimer but also the fact that the Embassy, in common with a fair few both on Asean Now and even in Immigration themselves, appear to be in some terminological difficulty in distinguishing between a visa and an extension of stay!

Well, it would be nice if the Savannakhet website could make it crystal clear that only Laotian nationals and residents can apply for METV's at that particular consulate, I think!

Instead of returning from Laos with another visa exemption why not instead return with a multi-entry tourist visa obtained from the consulate at Savannakhet - assuming, of course, that you can meet their requirements (see link below)? That should give you more than sufficient headroom to stay in Thailand (with border runs every 60 days) until your child is born. https://savannakhet.thaiembassy.org/th/publicservice/104412-tourist-visa?page=5d84a44c15e39c26b400453e&menu=5d84a44c15e39c26b4004540