Milk profiles of total saturated (A), mono-unsaturated (B) and poly-unsaturated (C) fatty acids with total content in medium chain saturated and in mono-unsaturated fatty acids presented in miniature (A,B). Total content of long chain fatty acids (D) and long-chain/medium-chain fatty acids (E), unsaturated/saturated fatty acids (F), n-6 PUFA/n-3 PUFA (G) and AA/DHA (H) ratios at day 20 of lactation. AA: Arachidonic acid; DHA: Docosahexaenoic acid; MCSAT: Medium chain saturated fatty acids (C8:0 to C12:0); MUFA: monounsaturated fatty acid; LCFA: Long-chain fatty acid that contains at least 16 carbons; MCFA: Medium-chain fatty acid that contains less than 16 carbons. Values of p-values (assessed by Mann–Whitney U test) between “western diet” and “control diet” groups were reported with *, ***, or ****, significantly different; p < 0.05, p < 0.001 or p < 0.0001, respectively and “ns” for no significance.