Are you sure her parents did not have another daughter immediately after Christina died in 1845 whom they named after her dead sister? Is there a death certificate for the child that died 6 October 1845?
Are the records bad? I don't know why they would say she lived only 11 days if she survived childhood, married, and had children of her own. Infant mortality was much greater in 1845 than it is today and many a parent outlived some of their children. Admittedly, infant mortality is too high today in many countries where we have the medical resources to save many infants who would have otherwise died.
Margareta Kristina Berglund
mentioned in the record of Lovisa Markstrom
Other information in the record of Lovisa Markstrom
from Sweden Baptisms
Sweden Baptisms, 1611-1920
Citing this Record
"Sweden Baptisms, 1611-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V7G3-4YH : 9 December 2014), Margareta Kristina Berglund in entry for Lovisa Markstrom, 30 Oct 1867; citing PITEA LANDS,NORRBOTTEN,SWEDEN, reference ; FHL microfilm unknown.
Christina Margretha Berglund
mentioned in the record of Hilda Margaretha Lindvall
Other information in the record of Hilda Margaretha Lindvall
"Sweden Baptisms, 1611-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V7PJ-NML : 9 December 2014), Christina Margretha Berglund in entry for Hilda Margaretha Lindvall, 05 Mar 1869; citing PITEA,NORRBOTTEN,SWEDEN, reference ; FHL microfilm 201,122.
Christina Margaretha Berglund
mentioned in the record of Ernst August Lindwall
Other information in the record of Ernst August Lindwall
"Sweden Baptisms, 1611-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V7YB-5M3 : 9 December 2014), Christina Margaretha Berglund in entry for Ernst August Lindwall, 06 Sep 1873; citing PITEA,NORRBOTTEN,SWEDEN, reference ; FHL microfilm 201,124.
mentioned in the record of Anna Viktoria Lindvall
Other information in the record of Anna Viktoria Lindvall
"Sweden Baptisms, 1611-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VWMM-V48 : 9 December 2014), Christina Margretha Berglund in entry for Anna Viktoria Lindvall, 10 Sep 1871; citing PITEA,NORRBOTTEN,SWEDEN, reference ; FHL microfilm 201,123.
If the data on familysearch that was quoted is correct, should could have done neither as she was 11 days old when she died.
If you have other proof that she lived past October 6, 1845, then both events might have been possible. Based on the source, I'd mark never married and had no children.
familysearch.org/ark:/61903/1:1:VWH8-FHS : 9 December 2014
familysearch.org/ark:/61903/1:1:V7G3-XSQ : 9 December 2014
familysearch.org/ark:/61903/1:1:VWMM-YYX : 9 December 2014
familysearch.org/ark:/61903/1:1:FG77-6WT : 9 December 2014
familysearch.org/ark:/61903/1:1:M4PM-S1C : 11 August 2016
