Paper request

1.Clinical Chemistry in Pregnancy
https://onlinelibrary.wiley.com/doi/abs/10.1002/9780470015902.a0023397

2. Clinical Chemistry of Pregnancy
https://www.sciencedirect.com/science/article/abs/pii/S0065242308600852

3. Clinical Biochemistry of Pregnancy
https://www.tandfonline.com/doi/epdf/10.3109/10408369709038216?needAccess=true

4. Endocrinology of the Placenta
https://link.springer.com/chapter/10.1007/978-3-662-66256-4_5

Thank you in advance
Arunya_aj@outlook.com