Attached the EFSA report for pregnant women with all the nutrients accounted for in both products. To explain the report a little bit, the PRI value (if given) is the intake of a nutrient that is likely to meets the needs of almost all healthy people in a population. In the absence of this, the AI (adequate intake) column is based on observations or experiments, that is assumed to be adequate for the population's needs. The most important column really is the UL (upper limit) column which is the maximum nutrient intake across supplements and food that you should consume in a day. 

To put both formulas side by side with the safe upper limit in mind, it looks like the below:

 

Nutrient

HSN

Pregnancy

UL

Vitamin C

40mg

 

 

Biotin

500μg

 

 

Pantothenic acid

6mg

 

 

Zinc

2mg

 

 

Selenium

200μg

 

 

Iodine

150μg

150µg

600µg

Vitamin D3

 

75μg

 

Vitamin K2

 

75μg

 

Vitamin B12

 

50μg

 

Folic Acid

 

400μg

 

Iron

 

5mg

 

 

From the above, it should be fine to take both products together but always recommend they consult their GP or midwife prior to doing so.