Approximately five months after the death of his 2½-year-old son, Henry, comedian and Marblehead native Rob Delaney announced Saturday on Twitter that his wife, Leah, is expecting another child.

Delaney, who now lives in London and stars in the Amazon comedy “Catastrophe,’’ wrote in a tweet that two midwives from the United Kingdom’s National Health Service had visited him and his pregnant wife for a home birth assessment.

Delaney’s tweet also featured a video he made for the Democratic Socialists of America detailing how he says the United Kingdom’s national health care system benefited both Henry and Delaney’s entire family.

“Our son Henry passed away in January of this year from cancer,’’ Delaney, who is a member of the DSA, said in the video. “And he was a beautiful little boy from the moment he was born until the moment he died. And he benefitted so much from the health care system here, which is, you know, a national health care system. And so did we, as his parents. Because while we endured stress that was truly unbelievable, we didn’t endure the financial stress of wondering, ‘Are we going to be able to pay for this? Are we going to have to move during his treatment because we have to move in with relatives?’ And what a gift.’’

In the video, Delaney criticized the United States’ health care system.

“There’s nothing more certain than the fact that you’re going to need medical care of some kind or another, and you should be able to have it,’’ Delaney said. “And the United States of America can extremely afford it. What they can’t afford is a system that we have now, which is bananas.’’

Delaney originally announced Henry’s death in February in an emotional Facebook post.

“Henry was a joy,’’ Delaney wrote. “He was smart, funny, and mischievous and we had so many wonderful adventures together, particularly after he’d moved home following fifteen months living in hospitals. His tumor and surgery left him with significant physical disabilities, but he quickly learned sign language and developed his own method of getting from A to B shuffling on his beautiful little bum. His drive to live and to love and to connect was profound.’’

KEVIN SLANE, Boston.com