स्तनपान (दुग्ध उत्पादन) की शुरुआत और उसके नियमन के लिए मुख्य रूप से कौन सा हार्मोन जिम्मेदार है?

Which digestive hormone inhibits both gastric secretion and motility, stimulates insulin release, and is secreted mainly when fat is present in the duodenum?

The repeated sequence of gradual onset of apnoea followed by gradual restoration of respiration is called ________.