Inclusion Criteria:  Single pregnancy At least 18 years old Stable clinical situation after complete tocolysis cycle of 48 h without indication for continuation of tocolysis Gestational age at randomisation >28 weeks (28+0) and <34 weeks (33+6) Good German or English skills Written informed consent  Exclusion Criteria:  Early premature rupture of the membranes (PPROM) Factors that make soon delivery likely (pre-eclampsia, suspect cardiotocography, clinical signs of an amniotic infection) Body temperature >38°C Cervical length < 10 mm at beginning of tocolysis Contraindication for B. pinnatum, lactose or wheat protein allergy Taking Bryophyllum 50% chewable tablets or powder during the last 30 days Taking psychotropic drugs (Benzodiazepines, antidepressants, neuroleptics) Diagnosed psychiatric disease (depression, anxiety disorder, adaptation disorder, post- traumatic stress disorder, bipolar disorder) Active participation in another interventional study during the last 4 weeks Known or suspected non-compliance with study protocol Drug or alcohol abuse