. 2018 Jun 8;9:2233. doi: 10.1038/s41467-018-04641-7

Table 1.

Overview of cohort

Infant	Gender	Mode of delivery	Formula or breast milk	Day of first sample	Day of last sample	Samples	Observed OTUs	Unique OTUs	Day of introduction of solid food
ID1	Girl	Vaginal	BM	2	355	241	808	17	186
ID2	Boy	Vaginal	F	6	366	223	754	61	159
ID3	Girl	Vaginal	BM	5	365	257	1029	35	165
ID4^a	Girl	Vaginal	BM	4	357	266	934	22	126
ID5^a	Boy	Vaginal	BM	2	367	253	999	43	116
ID6	Boy	Vaginal	Mix	2	363	196	538	6	121
ID7	Boy	Vaginal	BM	9	365	116	643	25	122
ID8	Girl	Vaginal	BM	54	362	209	497	6	247
ID9	Girl	C-section	BM	4	364	250	900	71	182
ID10^b	Boy	C-section	Mix	6	365	203	867	21	172
ID11^b	Girl	C-section	Mix	6	365	234	768	11	173
ID12	Girl	Vaginal	Mix	1	366	236	849	13	122

BM = breast milk, F = formula fed, Mix = both breast milk and formula. The numer of OTUs observed are the total number of OTUs observed in an infant over the entire sampling period. The number of unique OTUs are the number of OTUs found only in that infant

^aID4 and ID5 are siblings born ~16 months apart

^bID10 and ID11 are fraternal twins