Table 1 Demographic and clinical characteristics of the mother/infant pairs, that provided precolostrum and infant oral samples for this study.

From: Microbiota of human precolostrum and its potential role as a source of bacteria to the infant mouth

Mother-infant pair code

Age (years)

Pregnancy number

Gestational age (weeks)

Infant age (days, at sampling)

Delivery mode

Use of antibiotics during pregnancy

1

35

Second

37

7

Vaginal

Yes (at week 21; 7 days)

2

35**

Second

37

6

Vaginal

No

3

32**

First

39

6

Vaginal

No

4

36

Second

37

7

Vaginal

No

5

45

First

40

7

Vaginal

No

6

31

First

39

5

Vaginal

No

7

33

First

39

5

Vaginal

No

8

41

Second

37

6

Vaginal

No

9

33

First

38

7

C-section

Yes (at week 14; 10 days)

10

34

First

37

6

Vaginal

No

11

32

First

38

5

Vaginal

No

12

34

First

40

5

Vaginal

No

16

31*

First

38

6

Vaginal

No

17

29

Second

41

7

C-section

No

18

33

First

39

6

Vaginal

No

19

30

First

40

7

Vaginal

No

20

29

First

38

7

Vaginal

No

  1. *Include a pair of twins.
  2. **Samples collected from these two mother-infant pairs could not be analysed through 16S metagenomic sequencing due to low quality of obtained DNA.