名词短语
中文翻译：胎儿头部的订婚
同义词：
['fetal engagement', "fetal union例句：1. The couple'sengagement was announced on social media.（这对夫妇在社交媒体上宣布了订婚。）"]
例句：
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1. The couple'sengagement was announced on social media.
这对夫妇在社交媒体上宣布了订婚。
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2. The engagementceremony took place in a beautiful church.
订婚仪式在一个美丽的教堂举行。
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3. Theengagement ring symbolizesthe beginning of a new lifetogether.
订婚戒指象征着共同生活的开始。